(a) Lấy trục \(Oy\) như đề bài quy ước.
Phương trình chuyển động: \(y=v_0t-\dfrac{1}{2}gt^2\).
Khi đá đạt độ cao cực đại: \(v=v_0-gt=0\Leftrightarrow t=\dfrac{v_0}{g}\).
Suy ra: \(y\left(t\right)=\dfrac{v_0^2}{2g}\). Độ cao cực đại: \(H=h+y\left(t\right)\)
\(\Rightarrow H=h+\dfrac{v_0^2}{2g}=80+\dfrac{30^2}{2\cdot9,8}\approx125,92\left(m\right)\).
(b) Hòn đá đi qua gốc tọa độ khi \(y=0.\)
Suy ra: \(v_0t-\dfrac{1}{2}gt^2=0\Leftrightarrow t=\dfrac{2v_0}{g}=\dfrac{2\cdot30}{9,8}\approx6,12\left(m\right)\)
Vận tốc hòn đá: \(v\left(t\right)=v_0-gt=-v_0=-30\left(ms^{-1}\right)\)
(c) Khi đá chạm vách núi: \(y=v_0t-\dfrac{1}{2}gt^2=-h=-80\).
Thay số, giải phương trình, thu được: \(t\approx8,13\left(s\right)\) (loại nghiệm âm).
Suy ra vận tốc đá: \(v\left(t\right)=v_0-gt\approx-49,68\left(ms^{-1}\right)\)
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cho góc xOy nhọn,Oz là tia phân giác của góc xOy.M là điểm bất kì trên tia Oz(M ko trùng với O).Qua M vẽ đường thẳng a vuông góc với Ox tại C và vẽ đường thẳng b vuông góc với Oy tại B cắt Ox tại D
a)CM:MB=MA
b)CM:ΔBMC=ΔAMD.Từ đó suy ra ΔDMC là tam giác cân tại M
c)CM:DM+AM<DC
d)CM:OM⊥CD
Mn ơi giúp mình với mình cần gấp mai ktra rùi ạ sos
Mng ơi giúp mk vs ạ ;((((
Câu 1: Kể tên các môi trường sống của sinh vật? Các nhân tố sinh thái? Giới hạn sinh thái là gì? Cách đọc biểu đồ giới hạn sinh thái của sinh vật.
Câu 2: Hệ sinh thái là gì? Các thành phần của hệ sinh thái? Vẽ được chuỗi thức ăn và lưới thức ăn?
* Tham khảo:
Câu 1:
- Các môi trường sống của sinh vật có thể bao gồm:
+ Môi trường nước ngọt (sông, ao, hồ)
+ Môi trường nước lợ (đầm lầy, vùng bãi biển)
+ Môi trường biển (vùng biển, đại dương)
+ Môi trường đất liền (rừng, sa mạc, thảo nguyên)
+ Môi trường khí quyển (không khí)
- Nhân tố sinh thái là các yếu tố trong môi trường mà sinh vật tương tác với nhau và với môi trường sống. Đây có thể là yếu tố vật lý như nhiệt độ, ánh sáng, độ ẩm, hoặc yếu tố sinh học như thức ăn, kẻ thù, đối tác cộng sinh.
- Giới hạn sinh thái là ranh giới hoặc điều kiện mà một loài sinh vật không thể vượt qua hoặc tồn tại trong điều kiện đó. Điều này có thể là do các yếu tố vật lý như nhiệt độ tối đa/tối thiểu, độ ẩm, ánh sáng, hoặc yếu tố sinh học như sự cạnh tranh với các loài khác.
- Biểu đồ giới hạn sinh thái của sinh vật thường biểu diễn biên độ của các yếu tố môi trường (ví dụ: nhiệt độ, độ ẩm) mà sinh vật có thể chịu đựng. Đường biểu đồ thường là biểu diễn ranh giới tối đa và tối thiểu của các yếu tố này.
Câu 2:
- Hệ sinh thái là một cộng đồng các sinh vật sống trong cùng một khu vực và tương tác với nhau cũng như với môi trường vật lý xung quanh.
- Các thành phần của hệ sinh thái bao gồm:
+ Sinh vật: bao gồm cả thực vật và động vật
+ Môi trường vật lý: bao gồm không khí, nước, đất và các yếu tố vật lý khác như nhiệt độ, ánh sáng, độ ẩm.
+ Mối quan hệ tương tác giữa các sinh vật và môi trường, bao gồm chuỗi thức ăn, sự cạnh tranh và sự phụ thuộc lẫn nhau.
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Khi bỏ cục nước đá vô lý nước cam thì sự tăng giảm nội năng xảy ra như thế nào?
- Khi bỏ cục đá vào nước cam ấm, nhiệt độ của nước cam giảm xuống trong khi nhiệt độ của cục đá tăng lên, cho đến khi đạt được sự cân bằng nhiệt độ.
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viết đoạn văn tả về ngôi nhà tương lai bằng tiếng anh
*Tham khảo:
In the future, homes will be amazing! They won't just be ordinary houses; they'll be super cool places to live. Picture a house that's like a secret hideout, but also super eco-friendly. The walls will be covered in plants, making the air fresher. Windows will be magic - they'll let just the right amount of sunlight in, and they'll even change color! Inside, rooms will change to fit whatever we need. Plus, everything will be super high-tech and save lots of energy. It'll be the best place ever to live!
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Exercise 12. Give the correct form of the word in brackets.1. Most teachers insist on their pupils ___________________ (do) the homework.2. She has often made me ___________________ (cry).3. I expect ___________________ (hear) from you by Monday.4. Its no use ___________________ (pretend) ___________________ (like) her food.5. How old were you when you learnt ___________________ (drive) ?6. I dont mind ___________________ (walk) home but Id rather ___________________(get) a taxi.7. I cant make a...
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Exercise 12. Give the correct form of the word in brackets.
1. Most teachers insist on their pupils ___________________ (do) the homework.
2. She has often made me ___________________ (cry).
3. I expect ___________________ (hear) from you by Monday.
4. It's no use ___________________ (pretend) ___________________ (like) her food.
5. How old were you when you learnt ___________________ (drive) ?
6. I don't mind ___________________ (walk) home but I'd rather ___________________
(get) a taxi.
7. I can't make a decision. I keep ___________________ (change) my mind.
8. We had to keep him from ___________________ (fall) off the cliff.
9.. He had made his decision and refused ___________________ (change) his mind.
10. It was a good holiday. I enjoyed ___________________ (be) by the sea.
Exercise 13. Put the verbs in brackets into their correct form: INFINITIVE or ING-FORM.
1. I dislike shopping because I can't stand ________ in crowded places (BE).
2. I avoid ________ places where there are crowds of people (VISIT)
3. She intends ________ up a lot of money so that she can go to Africa next year (SAVE).
4. I remember Steve ________ the gold medal in the race last year (WIN).
5. We have arranged for the plumber ________ tomorrow (COME).
6. It is necessary for him ________ harder (STUDY)
7. I need ________ this project today (FINISH).
8. I insist on ________ you with the dishes (HELP)
9. Some people expect things ________ wrong on the 13th of every month (GO)
10. Stuart agreed ________ the car for me (WASH)
Exercise 14. Complete the sentence with Gerund or Infinitive.
1. Suddenly everybody stopped __________ . There was complete silence. (TALK)
2. He seems _________ some weight (HAVE LOSE)
3. Can you remind me ________ Ann tomorrow ? (PHONE)
4. I remember _________ along the road when I saw a strange animal (DRIVE)
5. Please don't keep _________ me when I have something important to say. (INTERRUPT)
6. I think his decision __________ up the job was stupid (GIVE)
7. I'm sorry to keep you ________ so long (WAIT)
8. I promised _______ late (NOT BE)
9. Are you thinking of ______ a new car ? (BUY)
Exercise 12. Give the correct form of the word in brackets.
1. Most teachers insist on their pupils ________doing___________ (do) the homework.
2. She has often made me _______cry____________ (cry).
3. I expect _________to hear__________ (hear) from you by Monday.
4. It's no use __________pretending_________ (pretend) ________to like___________ (like) her food.
5. How old were you when you learnt __________to drive_________ (drive) ?
6. I don't mind ___________walking________ (walk) home but I'd rather ________get___________
(get) a taxi.
7. I can't make a decision. I keep ____________changing_______ (change) my mind.
8. We had to keep him from _______falling____________ (fall) off the cliff.
9.. He had made his decision and refused _______to change____________ (change) his mind.
10. It was a good holiday. I enjoyed ________being___________ (be) by the sea.
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Exercise 13. Put the verbs in brackets into their correct form: INFINITIVE or ING-FORM.
1. I dislike shopping because I can't stand ___being_____ in crowded places (BE).
2. I avoid ___visiting_____ places where there are crowds of people (VISIT)
3. She intends ____to save____ up a lot of money so that she can go to Africa next year (SAVE).
4. I remember Steve ___winning_____ the gold medal in the race last year (WIN).
5. We have arranged for the plumber ___to come_____ tomorrow (COME).
6. It is necessary for him ____to study____ harder (STUDY)
7. I need _____to finish___ this project today (FINISH).
8. I insist on _____helping___ you with the dishes (HELP)
9. Some people expect things _____to go___ wrong on the 13th of every month (GO)
10. Stuart agreed ____to wash____ the car for me (WASH)
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Exercise 14. Complete the sentence with Gerund or Infinitive.
1. Suddenly everybody stopped _____talking_____ . There was complete silence. (TALK)
2. He seems _____to have lost____ some weight (HAVE LOSE)
3. Can you remind me ____to phone____ Ann tomorrow ? (PHONE)
4. I remember _____driving____ along the road when I saw a strange animal (DRIVE)
5. Please don't keep ____interrupting_____ me when I have something important to say. (INTERRUPT)
6. I think his decision _____to give_____ up the job was stupid (GIVE)
7. I'm sorry to keep you ___wait_____ so long (WAIT)
8. I promised ____not to be___ late (NOT BE)
9. Are you thinking of ___buying___ a new car ? (BUY)
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Exercise 8. Gerund or Infinitive – Fill in the correct form.1. ________________ is not allowed here. (fish)2. I heard the TV set ________________ . (explode)3. She appeared ________________ very nervous. (be)4. I keep ________________ you - it was an accident. (tell)5. Jack is good at ________________ ceilings. (paint)6. She wondered who ________________ . (ask)7. It is difficult ________________ him. (understand)8. She did not know what ________________ from them. (expect)9. My wife warned us _...
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Exercise 8. Gerund or Infinitive – Fill in the correct form.
1. ________________ is not allowed here. (fish)
2. I heard the TV set ________________ . (explode)
3. She appeared ________________ very nervous. (be)
4. I keep ________________ you - it was an accident. (tell)
5. Jack is good at ________________ ceilings. (paint)
6. She wondered who ________________ . (ask)
7. It is difficult ________________ him. (understand)
8. She did not know what ________________ from them. (expect)
9. My wife warned us ________________ the table. (not touch)
10. He refused ________________ me what all the fuss was about. (tell)
11. There’s no sense in ________________ him. He’s not at home. (visit)
12. Elephants are known ________________ a fantastic memory. (have)
13. I let her ________________ on with her work. (get)
14. Colin had no idea of how ________________ into the house. (get)
15. I’d rather ________________ in bed than go to work. (be)
Exercise 9. Gerund or Infinitive – Fill in the correct form.
1. ________________ is not allowed here. (fish)
2. I heard the TV set ________________ . (explode)
3. She appeared ________________ very nervous. (be)
4. I keep ________________ you - it was an accident. (tell)
5. Jack is good at ________________ ceilings. (paint)
6. She wondered who ________________ . (ask)
7. It is difficult ________________ him. (understand)
8. She did not know what ________________ from them. (expect)
9. My wife warned us ________________ the table. (not touch)
10. He refused ________________ me what all the fuss was about. (tell)
Exercise 10. Gerund or Infinitive – Fill in the correct form.
1. They are likely __________________ up at any time. (show)
2. The man denied __________________ the crime. (commit)
3. Their memories of __________________ in Africa will stay with them forever. (travel)
4. He has always been afraid of __________________. (fly)
5. __________________ is good for your health. (swim)
6. Would you mind __________________ me the sugar. (pass)
7. She promised __________________ the report as soon as possible. (read)
8. I had a hard time __________________ the situation to my husband. (explain)
9. She had some problems __________________ without glasses. (read)
10. Paul gave up __________________ five years ago. (smoke)
Exercise 11. Gerund or Infinitive – Fill in the correct form.
1. Most teachers insist on their pupils ___________________ (do) the homework.
2. She has often made me ___________________ (cry).
3. I expect ___________________ (hear) from you by Monday.
4. It's no use ___________________ (pretend) ___________________ (like) her food.
5. How old were you when you learnt ___________________ (drive) ?
6. I don't mind _____________ (walk) home but I'd rather ___________ (get) a taxi.
7. I can't make a decision. I keep ___________________ (change) my mind.
8. We had to keep him from ___________________ (fall) off the cliff.
9. He had made his decision and refused _____________ (change) his mind.
10. It was a good holiday. I enjoyed ___________________ (be) by the sea.
Exercise 8. Gerund or Infinitive – Fill in the correct form.
1. ________Fishing________ is not allowed here. (fish)
2. I heard the TV set _______explode_________ . (explode)
3. She appeared _______to be_________ very nervous. (be)
4. I keep _________telling_______ you - it was an accident. (tell)
5. Jack is good at ______painting__________ ceilings. (paint)
6. She wondered who _________to ask_______ . (ask)
7. It is difficult _______to understand_________ him. (understand)
8. She did not know what _____to expect___________ from them. (expect)
9. My wife warned us _______not to touch_________ the table. (not touch)
10. He refused _________to tell_______ me what all the fuss was about. (tell)
11. There’s no sense in ________visiting________ him. He’s not at home. (visit)
12. Elephants are known _______to have_________ a fantastic memory. (have)
13. I let her _______get_________ on with her work. (get)
14. Colin had no idea of how _____to get___________ into the house. (get)
15. I’d rather _______be_________ in bed than go to work. (be)
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Exercise 9. Gerund or Infinitive – Fill in the correct form.
1. ________Fishing________ is not allowed here. (fish)
2. I heard the TV set _______explode_________ . (explode)
3. She appeared _______to be_________ very nervous. (be)
4. I keep _________telling_______ you - it was an accident. (tell)
5. Jack is good at ______painting__________ ceilings. (paint)
6. She wondered who _________to ask_______ . (ask)
7. It is difficult _______to understand_________ him. (understand)
8. She did not know what _____to expect___________ from them. (expect)
9. My wife warned us _______not to touch_________ the table. (not touch)
10. He refused _________to tell_______ me what all the fuss was about. (tell)
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Exercise 10. Gerund or Infinitive – Fill in the correct form.
1. They are likely ___________to show_______ up at any time. (show)
2. The man denied _________committing_________ the crime. (commit)
3. Their memories of ________travelling__________ in Africa will stay with them forever. (travel)
4. He has always been afraid of ______flying____________. (fly)
5. _______Swimming___________ is good for your health. (swim)
6. Would you mind ________passing__________ me the sugar. (pass)
7. She promised ____________to read______ the report as soon as possible. (read)
8. I had a hard time __________to explain________ the situation to my husband. (explain)
9. She had some problems _________to read_________ without glasses. (read)
10. Paul gave up _________smoking_________ five years ago. (smoke)
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Exercise 6. Give the correct form. Gerund or Infinitive?1. Do you feel like (go)_______ to the theatre on Friday?2. I spent a lot of time (make)_______ a birthday cake for him.3. He agreed (see)_______ me at ten oclock4. They promised (read) _______my report today5. I suggest (pay) _______by check, its safer than cash6. He offered (make) _______dinner for us.7. He put off (see) _______her until very late in the afternoon.8. I refused (pay) _______for the repairs.9. Ive finished (read)_______ tha...
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Exercise 6. Give the correct form. Gerund or Infinitive?
1. Do you feel like (go)_______ to the theatre on Friday?
2. I spent a lot of time (make)_______ a birthday cake for him.
3. He agreed (see)_______ me at ten o'clock
4. They promised (read) _______my report today
5. I suggest (pay) _______by check, it's safer than cash
6. He offered (make) _______dinner for us.
7. He put off (see) _______her until very late in the afternoon.
8. I refused (pay) _______for the repairs.
9. I've finished (read)_______ that book at last!
10. We decided (go)_______ to the cinema instead
11. I enjoyed the play. The (act)_______ was very good.
12. I love going to her class, her (teach) _______is never boring.
13. He's my favorite writer, his (write) _______is wonderful.
14. His (complain)_______ is getting on my nerves. He's never happy.
15. They have terrible debts. Their (spend) _______is out of control
16. It's a very fit team. Their (train)_______ is very intensive.
17. I can still remember (visit)_______ my grandparents fifty years ago.
18. Please, remember (feed)_______ the dog while I'm away
19. I'll never forget (see)_______ that van Gogh exhibition in New York
20. Don't forget (post) _______my letters, please.
21. I regret (lend)_______ him the money. He never paid it back.
22. We regret (inform)_______ you that your application has been refused.
23. I'll just finish (clean) _______the kitchen then I'll stop.
24. She suggested (have)_______ dinner at her house.
25. She doesn't mind (do)_______ the boring jobs.
26. He keeps (ask)_______ me to go out with him.
27. He has given up (smoke)_______.
28. He's very good at (get)_______ me to do what he wants
29. He insisted on (be)_______ refunded immediately.
30. He failed. He's very bad at (do)_______ exams.
Exercise 7. Put the verb into the gerund or the infinitive
1) It appears (be)______ raining.
2) We intend (go) ______ to the mountain this Sunday.
3) I pretended (be) ______ sick so I didn't have to go to school.
4) Can you imagine (live) ______ without internet?
5) They tolerate (smoke) ______ but they prefer people not to.
6) I anticipate (arrive) ______ on Saturday.
7) A party involves (negotiate) ______ with everyone in the family.
8) He denies (steal) ______ the purse.
9) Tom claims (be) ______ a billionaire but I don't believe him.
10) I expect (be) ______ there about eight.
11) Julia reported (see) ______ the boys to the police.
12) It tends (rain) ______ a lot in Da Lat.
13) Do you recall (meet) ______ her at the party last night?
14) She mentioned (go) ______ to the cinema, but I don't know what she decided to do in the end.
15) The teenager refused (go) ______ on holiday with his parents.
Exercise 6. Give the correct form. Gerund or Infinitive?
1. Do you feel like (go)___going____ to the theatre on Friday?
2. I spent a lot of time (make)___making____ a birthday cake for him.
3. He agreed (see)____to see___ me at ten o'clock
4. They promised (read) ___to read____my report today
5. I suggest (pay) ___paying____by check, it's safer than cash
6. He offered (make) ___to make____dinner for us.
7. He put off (see) _____seeing__her until very late in the afternoon.
8. I refused (pay) __to pay_____for the repairs.
9. I've finished (read)____reading___ that book at last!
10. We decided (go)__to go_____ to the cinema instead
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11. I enjoyed the play. The (act)___acting____ was very good.
12. I love going to her class, her (teach) __teaching_____is never boring.
13. He's my favorite writer, his (write) ____writing___is wonderful.
14. His (complain)___complaining____ is getting on my nerves. He's never happy.
15. They have terrible debts. Their (spend) ____spending___is out of control
16. It's a very fit team. Their (train)__training_____ is very intensive.
17. I can still remember (visit)_____visiting__ my grandparents fifty years ago.
18. Please, remember (feed)__to feed_____ the dog while I'm away
19. I'll never forget (see)__seeing_____ that van Gogh exhibition in New York
20. Don't forget (post) __to post_____my letters, please.
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21. I regret (lend)___lending____ him the money. He never paid it back.
22. We regret (inform)___to inform____ you that your application has been refused.
23. I'll just finish (clean) ____cleaning___the kitchen then I'll stop.
24. She suggested (have)___having____ dinner at her house.
25. She doesn't mind (do)___doing____ the boring jobs.
26. He keeps (ask)____asking___ me to go out with him.
27. He has given up (smoke)___smoking____.
28. He's very good at (get)____getting___ me to do what he wants
29. He insisted on (be)____being___ refunded immediately.
30. He failed. He's very bad at (do)____doing___ exams.
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1/ We read about an astronaut. The astronaut travelled into space in 1961 We read about...................................................................................................................................................2/ The class watched a film yesterday. The film was about the Apollo 13 space mission. The film................................................................................................................................................................3/ Althoug...
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1/ We read about an astronaut. The astronaut travelled into space in 1961
We read about...................................................................................................................................................
2/ The class watched a film yesterday. The film was about the Apollo 13 space mission.
The film................................................................................................................................................................
3/ Although I was in a hurry, I didn't forget to lock the door. (Despite)
...............................................................................................................................................................................
4/ Although she hates rock music, she went to the performance. (In spite of)
...............................................................................................................................................................................
5/ The school will constantly tailor its curriculum to meet changes in society
The school's curriculum.....................................................................................................................................
6/ Schools will not evaluate students' academic performance through exams only
Students' academic performance..............................................................................................................
7/ It's a pity they won't come here again.
I wish .................................................................................................................................................................
8/ The children wish they want to win the speaking contest
The children wish ............................................................................................................................................
9/ Mr Pike is excellent. I am talking to his course
Mr Pike .................................................................................................................................................
10/ Last year I visited a small town. They filmed The Little Girl there.
Last year .................................................................................................................................................
11/ Unless you leave home now, you will miss the flight.
→If .................................................................................................................................................
12. “Did you write a note for Anna?” I asked my mother.
→ I asked.................................................................................................................................................
13. Attend the class regularly and you can pass the test easily. (IF)
.................................................................................................................................................
14. The game was cancelled because it was raining heavily. (CALLED)
.................................................................................................................................................
15. Anne finished her homework then she read the book. (AFTER)
.................................................................................................................................................
16. We stayed in a magnificent hotel on our holiday in Dalat.
→ _ The hotel .................................................................................................................................................
17. I have a big test next week, so I can’t accompany you in this trip.
→ _ If.................................................................................................................................................
18. She doesn’t have any friends, so she feels lonely.
If _.................................................................................................................................................
19. “How long does it take to get to Mars?” Jim asked his father.
→_ Jim asked.................................................................................................................................................
20. We played volleyball then we drank orange juice.
àAfter......……………………………………………………………..…
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1/ We read about an astronaut. The astronaut travelled into space in 1961
We read about..............an astronaut who travelled into space in 1961 .....................................................................................................................................
2/ The class watched a film yesterday. The film was about the Apollo 13 space mission.
The film................which the class watched a film yesterday was about the Apollo 13 space mission................................................................................................................................................
3/ Although I was in a hurry, I didn't forget to lock the door. (Despite)
.............Despite being in a hurry, I didn't forget to lock the door..................................................................................................................................................................
4/ Although she hates rock music, she went to the performance. (In spite of)
............In spite of hating rock music, she went to the performance ...................................................................................................................................................................
5/ The school will constantly tailor its curriculum to meet changes in society
The school's curriculum.............will constantly be tailored to meet changes in society........................................................................................................................
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6/ Schools will not evaluate students' academic performance through exams only
Students' academic performance.........won't be evaluated through exams only.....................................................................................................
7/ It's a pity they won't come here again.
I wish ..............they would come here again...................................................................................................................................................
8/ The children wish they want to win the speaking contest
The children wish ........they would win the speaking contest....................................................................................................................................
9/ Mr Pike is excellent. I am talking to his course
Mr Pike ......., whose course I am talking to, is excellent .........................................................................................................................................
10/ Last year I visited a small town. They filmed The Little Girl there.
Last year .................I visited a small town where they filmed the Little Girl................................................................................................................................
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11/ Unless you leave home now, you will miss the flight.
→If .......you don't leave home now, you will miss the flight. ..........................................................................................................................................
12. “Did you write a note for Anna?” I asked my mother.
→ I asked...........my mother if she had written a note for Anna......................................................................................................................................
13. Attend the class regularly and you can pass the test easily. (IF)
...............If you attend the class regularly, you can pass the test easily. ..................................................................................................................................
14. The game was cancelled because it was raining heavily. (CALLED)
................The game was called off because it was raining heavily. .................................................................................................................................
15. Anne finished her homework then she read the book. (AFTER)
...............After finishing her homework, Anne read the book..................................................................................................................................
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Exercise 5. Choose the correct answer.1. I do not have enough money _________ this book.A. buyB. to buyC. buyingD. bought2. It is no use _________ to school if you _________ to work hard.A. going / do not readyB. to go / do not readyC. going / are not readyD. go / are not ready3. They spent all day _________ and _________ on the beach.A. to swim / sunbathingB. to swim / to sunbatheC. swimming / to sunbatheD. swimming / sunbathing4. We were made _________ all the cleaning in the house.A. to doB....
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Exercise 5. Choose the correct answer.
1. I do not have enough money _________ this book.
A. buy
B. to buy
C. buying
D. bought
2. It is no use _________ to school if you _________ to work hard.
A. going / do not ready
B. to go / do not ready
C. going / are not ready
D. go / are not ready
3. They spent all day _________ and _________ on the beach.
A. to swim / sunbathing
B. to swim / to sunbathe
C. swimming / to sunbathe
D. swimming / sunbathing
4. We were made _________ all the cleaning in the house.
A. to do
B. do
C. doing
D. done
5. We regret _________ you that you have exceeded your overdraft facility.
A. to inform
B. informing
C. to tell to
D. telling
6. Why don’t you try _________ the key anti-clockwise?
A. to turn
B. on turning
C. turning
D. turn
7. We don’t allow _________ in the classrooms.
A. that students smoke
B. smoke
C. students to smoke
D. to smoking
8. I really must _________ on with my work now.
A. to get
B. getting
C. get
D. to getting
9. Why don’t you do what you’re told, instead of _________ such a song and dance about it?
A. to make
B. making
C. made
D. make
10. I rashly posted the parcel without _________ it.
A. weighing
B. weigh
C. weighed
D. to weigh
11. Can you please _________ me a little about yourself?
A. to tell
B. telling
C. tell
D. going to tell
12. How can you waste all that money on _________?
A. gamble
B. to gamble
C. gambling
D. the gamble
13. “My watch is broken. ” “Why don’t you _________”
A. have it repair
B. have it repairing
C. have it for repair
D. have it repaired
14. Yesterday we did nothing but _________
A. talking
B. talked
C. talk
D. had talked
15. Instead of _________ a new car, she'll have her old one _________.
A. to buy / repaired
B. buying / to repair
C. buying / be repaired
D. buying / repaired
16. I tried _________ the bus, but I missed it.
A. catching
B. to catch
C. catch
D. catch up
17. I'm sorry I haven't got any money _______ you. Why don't you try _________ Peter?
A. to lend / to ask
B. lending / asking
C. to lend / asking
D. lending / to ask
18. After _________ asleep, I saw a strange person at the foot of the bed.
A. fall
B. falling
C. fell
D. fallen
19. After all this time, John should take the bull by the horns and ask Mary _________ him.
A. to marry
B. marry
C. marrying
D. married
20. He told me _________ early.
A. to try to come
B. to try coming
C. try to come
D. try coming
1. B.
2. C.
3. D.
4. A.
5. A.
6. C.
7. C.
8. C.
9. B.
10. D.
11. C.
12. C.
13. D.
14. C.
15. D.
16. B.
17. D.
18. B.
19. A.
20. B.
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