Xác định số oxi hoá của các nguyên tố :

a/ HCl ; H₂O ; HClO ; HClO₃ ; HClO₄ ; NaCl₂

b/ NO ; NO₂ ; N₂O ; HNO₃ ; HNO₂ ; NaNO₃ ; Fe(NO₃)₃

c/ H₂S ; Na₂S ; SO₂ ; SO₃ ; H₂SO₄ ; K₂SO₄ ; Al₂(SO₄)₃

Một vật được ném từ một điểm M ở độ cao h = 45 m với vận tốc ban đầu v_o = 20 m/s theo phương trình nằm ngang. Lấy g = 10 m/s² , bỏ qua lực cản của không khí. Hãy xác định :

a. Dạng quỹ đạo của vật

b. Thời gian vật bay trong không khí

c. Tầm bay xa của vật

d. Vận tốc của vật khi chạm đất

WORD FORM :

1. Because of the volume of traffic, local councils are forced to give __________ for more roads to be constructed (permit)

2. My class is going to go on a two-day __________ to Hanoi (excurse)

3. He was very __________ of the work he had done (pride)

4. ___________ is a popular hobby (photograph)

5. Traveling by subway is fast, ____________ and cheap (convenience)

6. Her ________ was so great that she broke a glass (anxious)

7. The old fishing village is very _________ (picture)

8. I feel _________ in this book (interest)

9. The advantage of living in the countryside is that the air is ____________ (pollute)

10. People are becoming far more aware of _________ changes (environment)

11. There was a conference to promote international _________ (friend)

12. Don't waste __________ (electric)

13. Nam is one of the ______ on boat trip to Ha Long Bay (participate)

14. A lot of people were ___________ killed by tsunami in Japan in 2011 (disaster)

15. Gas and oil _________ always increased in cold weather (consume)

VERB TENSE :

1. Be careful ! The bus ___________ near (come)

2. 'Look at those dark clouds!' 'Yes, I looks like it ___________ ' (rain)

3. David (be) __________ born after his father (die) __________

4. This exercise must (correct) _________ by the teacher

5. Miss Trang is in hospital.

- Yes, I know. I _________ her (visit)

6. I (stay) ________ here until he answers me

7. He (tell) __________ you when you get there

8. I (come) ___________ and (see) ___________ you before I leave for England

9. ___________ it (still/ rain) ____________ when you came in ?

10. Everyone (rebuild) ____________ theirs homelands since the World War II (end) ___________

11. Yesterday (be) __________ the first day of the new school year

12. It's too hot in here. I (open) ___________ the window

13. When I (be) __________ a child, I (want) _________ to be a doctor

14. Long ago, my younger brother often (cry) ____________

15. Miss Helen will help you as soon as she (finish) __________ that letter

VERB FORM :

1. Sometimes I'd like (learn) ___________ to play the piano

2. When you see John, remember (give) _________ him my regards

3. Someone must have taken my bag. I clearly remember (leave) _________ it by window and now it has gone

4. It's very kind of you (say) __________ so

5. I have nothing (tell) __________ you today

6. I often avoid (go) _________ to parties

7. Please pardon my (disturb) __________ you

8. I think they are now accustomed to (work) _________ 12 hours a day

9. I'm very glad (meet) _________ you

10. It's no good (play) _________ video games

Turn into passive voice :

1. They haven't learned English for a long time

_________________________

2. My sister is cooking a lot of of food for the party

_________________________

3. I was washing my clothes when you called

_________________________

4. Mr Nam is drinking coffee in the living room now

_________________________

5. Did you buy that book at Phu Tho bookstore ?

_________________________

6. People speak English everywhere

_________________________

7. My brother can sing a lot of English songs very well

_________________________

8. My friend is decorating the room

__________________________

9. Lan has seen that film four times

__________________________

10. My father teaches me English every day

__________________________

Join the sentences, use Who, Which, Whose :

1. That's the boy. His father openned the new cinema

__________________________

2. I saw a film last night. It was very funny

___________________________

3. That's the man. He directed the film

___________________________

4. Kim's the girl. She won the writing competition

___________________________

5. I saw the DVD. You lent it to me

___________________________

6. This book is big. I like it

___________________________

7. Mary is 20. She comes from England

__________________________

8. I haven't seen my son. He hasn't visited me since May

__________________________

9. They have cleaned the car. It looks new again

_________________________

10. John and Peggy have just read the book. They can watch the film

__________________________

Xe ô tô khối lượng 2 tấn bắt đầu chuyển động nhanh dần đều trên đường ngang dưới tác dụng lực phát động 10.000 N, hệ số ma sát giữa bánh xe với mặt đường là 0,1 và không đổi suốt quãng đường. Lấy g = 10 m/s²

a) Tính gia tốc của chuyển động

b) Sau khi chuyển động được 5 giây, xe tắt máy, chuyển động chậm dần đều do lực ma sát. Xác định thời gian xe chuyển động chậm dần đều và quãng đường xe đi được trong giây cuối cùng

VERB TENSE :

1. I (have) ___________ no trouble with my English lessons up to now

2. George (do) __________ good work in this class so far

3. How long (you, learn) __________ English ?

4. The earth (circle) __________ the sun once every 365 days

5. Robert (wait) ___________ for you since noon

6. The last time she (write) __________ to us (be) _________ last year

7. Last night when we visited him, he ___________ an experiment upstairs (do) __________

8. He (not, laugh) ________ so much for ages

9. We (travel) __________ to Nha Trang twice this year

10. I (never/ meet) _________ such a famous person before

11. Keep silent ! My father (sleep) _________ in his room

12. He (pay) __________ a visit to Ha Long Bay in 1985

13. This morning while I (wait) __________ for the bus, the rain (stop) ___________

14. When I went back to the shop, they (sell) _________ the book I wanted

15. More than 50 films (show) __________ in Ha Noi since June

VERB FORM :

1. The house needs (paint) __________

2. The student promised (not,be) _________ late again

3. The school can't afford (buy) __________ all the computers it needs

4. We stopped (say) _________ hello to her

5. I don't feel like (go) ________ to the cinema now

6. She did nothing but (cry) _______

7. Tourists are not allowed (talk) _________ in the Temple

8. I can't stand (see) _______ her cry

9. The child admitted (tell) __________ a lie

10. Suddenly everybody stopped (talk) __________. There was silence