Bài 1:Một ô tô chạy từ A đến B với vận tốc 40km/h rồi lại chạy từ B đến A với vận tốc 30km/h. Tìm vận tốc trung bình của ô tô trên đoạn đường AB?

Bài 2: Một ô tô chuyển động trên đường thẳng AB. Tính vận tốc trung bình của xe biết

a. Trong nửa thời gian đầu xe đi với vận tốc v1 = 60km/h, trong nửa thời gian cuối xe đi với vận tốc v2 = 18km/h

b. Trong nửa quãng đường đầu xe đi với vận tốc 12km/h và trong nửa quãng đường cuối v2 = 18km/h

c. Trong nửa phần đầu đoạn đường AB xe đi với vận tốc 60km/h. Trong nửa đoạn đường còn lại ô tô đi nửa thời gian đầu với vận tốc 40km/h và nửa thời gian sau 20km/h

Bài 3: Lúc 7h sáng một xe ô tô khởi hành từ điểm A, chuyển động đều với vận tốc v1 = 20km/h đi về phia B cách A 60km. Cùng lúc đó một xe thứ hai khởi hành từ B đi về phía A với vận tốc không đổi v2 = 40km/h.

a. Tìm thời điểm và vị trí 2 xe gặp nhau? b. Thời điểm và vị trí khi hai xe cách nhau 3,6km?

Bài 4: Cùng một lúc, từ hai tỉnh A và B cách nhau 20 km có hai xe chuyển động thẳng đều theo chiều từ A đến B. Sau 2 giờ chuyển động thì chúng gặp nhau. Biết xe thứ nhất , xuất phát từ A có vận tốc 20 km/h. Bằng cách lập phương trình chuyển động, tìm vận tốc của xe thứ hai.

Bài 5: Hai xe khởi hành cùng lúc ở hai bến xe cách nhau 40 km. Biết hai xe chuyển động thẳng đều với vận tốc lần lượt là v1 và v2. Nếu chúng đi cùng chiều thì sau 2 giờ chuyển động, hai xe này sẽ đuổi kịp nhau. Nếu chúng đi ngược chiều, thì sau 24 phút chúng sẽ gặp nhau. Tính độ lớn vận tốc của mỗi xe?

Bài 6: Lúc 7 h, có một xe khởi hành từ A, chuyển động thẳng đều về B với vận tốc 40 km/h. Lúc 7 h 30 min, một chiếc xe khác từ B chuyển động về hướng A với vận tốc 50 km/h. Biết khoảng cách AB = 110 km.

a. Xác định vị trí của mỗi xe và khoảng cách giữa chúng lúc 8 h và 9 h?

b. Hai xe gặp nhau ở đâu? Lúc mấy giờ?

Cho tam giác ABC cân tại a kẻ hai đường phân giác BD và CE.

Chứng minh rằng:

a)AE=AD

b)Tứ giác BEDC là hình thang cân.

c)EB=ED

Viết câu so sánh hơn dùng các từ gợi ý.

1.Bob/look/strong/his brother.

2.last year/his salary/low/this year.

3.Ann/short/you?

4.Who/intelligent/you/in your class.

5.Your sister/good/you/think.

6.life in the countryside/peaceful/ life in the city

7.Fruits anh vegetables/healthy/fast food.

8.Yesterday/it/cold/today.

8.Today/Jane/beautiful/usual

9.My current job/demanding/my last one.

Các bạn có thể giải thích câu ý nghĩa này hộ mik đc ko ạ

"Đến khi chưa 15 - Đi chưa tròn 18 - Về khi đã trưởng thành”.

I Fill in the blank the correct form of the verb “ tobe “

1. My name ..... Minh. I...... 11 years old.

2. This ....... Hoa. She ...... my sister. She is 14 years old.

3. Who....... they ? They....... Lan and Trung. They ...... my friends.

4. How old ....... your brother ? He ....... 20 years old.

5. ...... father a doctor ? No, he........ . He ........ a worker.

6. ........ her mother is a worker ? Yes. She ..... a worker.

7. Thanh ...... my friend. Her brother ....... 14.

8. How .... you ? I...... fine.

II. Choose the best answer.

1. This is ....... ( I / my / he ) friend. ............ ( she / he / they ) is Nam.

2. How old is ......... ( she / they / you ) ? ................. ( i / he / she ) ten.

3. What is ...... ( his / her/ she / he ) name ? ................. ( his / her/ she / he ) is Trung.

4. ....... ( their/ they/ I / you ) are ........... ( she / he / her ) friends. ........... ( their/ they/ I / you ) houses are in the city.

5. ........... ( I / my / she / he ) teacher is very nice. ........... ( his / her/ she / he ) is Hang.

6. Huy is …… friend ( I / my )

7. ……… father is a doctor. ( her / she )

8. ……… is a student. ( He / His )

9. This is …… car. ( they / their )

10. ……. name is Mini. ( It / its )

11. …….. are from Hue. ( they / their )

12. …….. am eleven years old. ( I / my )

13. ……….. school is big. ( I / my )

14. …………. house is on Le Lai Street. ( Her / she )

15. Where is ……. School ? ( you / your )

IV. Underline the best option

1.There ( am / is / are ) a river near my house.

2.Is Mrs. Mai a nurse ? Yes, (he / she / it ) is.

3.We are ( in / on / to ) the yard.

4.Are those your pens ? Yes, (these / they / those) are.

5. ( Who / How / What ) is that ? That is a map.

6.Hello. (My / His / Her )name is Minh. I’m a student.

V. CHIA ĐỘNG TỪ :

1. She (be) _________very nice.

2. ________he (be) _________ tall?

3._________you (be) _________a teacher?

4.Mai (never be) ____________ in Hanoi.

5.My father (be) ……….… in HaNoi now.

6.Most children (be) .…scared of seeing the dentist.

7. I (be) ……………at home now

9.You (be)…..in class 7A ? - No. I (be)…in class 7D.

10.You ……… (be) free this morning , Tan ?

11.Trang …….(not be) in her room at the moment.

12.Thanh …………………. ( be ) a doctor

13. In VN there ( be) no lesson on Saturday

14.“Hung (be) …………..in hospital ?”.- Yes, he (be)

15.The students (not, be) .......……in class at present.

16. Where ( be ) ………………..your father now ?

17 . Mai ( be ) ………………….tired now .

18.I (be) . . . twelve years old, and David (be). . . . .,too.

19.Lan (be).. . . . . in the living room, but her sisters (be).. . . . in the yard.

20. –Hoa, (be).. . . .. you in grade 9? –Yes, Thao and I (be).. . . . . in class 9B.

21.My father (be).. . fine, but my mother . (be). . . not.

22. Those new books (be).. . . . . mine, and this small school bag (be).. . . . . yours

23.There ( be ) …………. twenty six boys in my class.

24…….Thu’s bags small ? No, they( not be )………

25.I (be )… in grade 6 and my sister ( be)… in grade 3.

26.Miss White‘s students (not be ) ………… tall. They( be) ………… short.

27.Lan’s brother ( be ) ………… a doctor.

28.How old Hoa ( be )……? She ( be ) …12 years old.

29.Mai and Hoa ( be ) ………… in grade 6. They ( be ) ………… friends of mine.

30. My brother (be) ………… a student.

31.My name ( be) ………… Lan. I (be) … in a grade 6.

32.My school (be) ………… in the country.

33. There (be) …………12 classrooms in my school.

34. What (be) ………… those?

35. Who (be) ………… that? It’s Lan.

36. My friend and I (be) ………… students?

37. There (be) ………… a pen in the desk.

38. She (not/be) ………… fine.

39. Lan and Linh (be) ………… students.

V.Em h·y ®iÒn mét ®¹i tõ nh©n x­ng hoÆc mét tÝnh tõ së h÷u vµo mæi chæ trãng ®Ó hoµn thµnh c¸c c©u sau

1. Mr. Hung is an engineer._________gets up at five fifty and brushes ___________teeth

2. Tam and I are students.____________are in class 6A. Mrs.Chi, Mr.Cuong and Miss.Van are ______teacher

3. How old is ____sister, Nga?

- _______________is eighteen years old.

4. What’re these? _______________are rulers

5. Mr. Coung and Mrs Mai has two children. ________________children are students

6________am trang, and this is ____new friend, Huong

VI.Đặt “there is / there are / there isn’t / there aren’t / is there / are there”.

1. How many tables ……………in your classroom ?

2. Excuse me, ………………… a bus stop near here ?

3. …………………twelve months in a year.

4. It’s a very modern city………a lot of skyscrapers.

5. …………………a bus from here to school at 6.30.

6. We can’t call him because …………. a telephone box near here.

7. My town is very poor. …………………any hotel.

8. …………………five people in family: my parents, my two sisters and me.

9. ……………….. a living room, two bedrooms and a kitchen in my house.

10. ........... twenty pupils and a teacher in the room.

VII. Chọn từ thích hợp:

1. (How old / How / How many) are you?I’m fine, thank you.

2. There (am / are / is) a big board in my classroom.

3. (She / We / He) are in our classroom.

4. (How much / How / How many) students are there in your class ? _ There are 40.

5. (What / Who /How) are these ? _ They’re my friends.

6. (How many / What / How) are there in your classroom ? _ tables, chairs, a board and a teacher’s desk.

7. (What / Which / Where) is your house ? _ It’s on Đien Bien Phu street.

8. What (are / does / do) your parents do ?

9. She lives with (his / her/ my) family.

10. How many (people / students /teachers) are there in your family ?

11. Lan is a good girl. (Her / His / My) parents are happy.

12. That is Mr.Ba with (her/his/their) students.

13. (Hoiw/Who/What) is your father ? _ He’s a doctor.

14. Lan (lives/live/living) on Nguyen Hue strret.

15. (This/That/These) are their pencils.

16. Hoa ! How old is (my/your/their) father ?

17. (What/How/Who) does your brother?_ He’s a student.

18. My father and mother are (teacher/teaches/teachers).

19. Lan’s father is a doctor. Tam’s father is a doctor, (too/to/two).

20. There are two (cookers/boards/couches) in my livingroom.

Cho tam giác ABC vuông tại A(AB<AC),Tia phân giác góc B cắt AC tại D.Vẽ DE vuông góc BC tại E

a)Chứng minh tam giác ABD=tam giác EBD

b)Cho AB=6cm,AC=8cm.Tính BC,EC

c)Gọi I là giao điểm của tia ED và BA.Chứng minh tam giác BIC cân

d)So sánh AD và DC

Cho đơn thức: A=\(\frac{1}{5}X^3Y\cdot\left(X^5Y\cdot Z^3\right)^2\)

a)Thu gọn:A

b)Xác định hệ số và bậc của A

I. Use these words to make meaningful sentences :

II. Use the words in the box to complete the passage

Comfortable / evening / finished / different / spend / popular / families / watch

Thirty years ago in Viet Nam, very few people jad TV sets. These TV owners were very (1)……………… In the (2)………………., every body gathered to watch black and white programs. They stayed until the programs (3)……………Viet Nam is (4)……………today. Many (5)……………have TV sets. People (6)…………TV in their own living rooms. Life is more (7)…………….and people don’t (8)……….much time together any more.

III. Read the passage then answer the questions

Ba likes playing video games. He usually goes to the amusement center to play them on Sunday morning. He often goes there once a week but he doesn’t spend much money. Hoa always advises him not to spend lots of time playing video games because video games can be addictive.

IV. Supply the correct form of the verbs in parentheses (1m)

1. Mr. Ha ( buy)…………….a car yesterday.

2. Everyday I (go)…………to school by bike.

3. Where ( be)………………….you last night ?

4. You should ( brush)………….your teeth after meal.

V. Make the questions for the answers

1. Peter is 42 kilos.

2. It is 5 kilometers from the bank to the hotel.

I. Khoanh tròn từ/ cụm từ/ câu đúng nhất ( ứng với A,B,C hoặc D)

1. Nga / watch /TV / last night

A. Nga watches TV last night B. Nga will watch TV last night

C. Nga is watching TV last night D. Nga watched TV last night

2. I like bananas and …………………

A. so does she B. She likes bananas, either.

C. neither does she D. She doesn’t like bananas, too.

3. My father is a ……………………tennis player.

A. skillful B. carefully C. skill D. skillfully

4. …………..was your vacation in Nha Trang ? It was wonderful.

A. When B. How C. What D. Where

5. What / you / do / the / evening ?

A. What do you usually do for the evening? B. What do you usually do on the evening?

C. What do you usually do in the evening? D. What do you usually at for the evening?

6. My sister ate durians yesterday, but I ……………..

A. didn’t B. don’t C. doesn’t D. did

7. Would you like…………. to the movies tonight ?

A. going B. to go C. goes D. go

8. He / good / volleyball / player

A. He is good a volleyball player B. He is a player good volleyball.

C. He is a volleyball good player. D. He is a good volleyball player.

9. Sometimes the noise keeps me awake …………………..night

A. for B. on C. in D. at

10. She could ……………………………the road and she wasn’t scared.

A. crossing B. crosses C. cross D. to cross

11. I can’t go for a walk now. I………………………my homework

A. must doing B. must to do C. must do D. must did

12. Would / you / like / play / table tennis / tonight ?

A .Would you like playing table tennis tonight ? B. Would you like play table tennis tonight ?

C. Would you like to play table tennis tonight ? D. Would you like plays table tennis tonight ?

13. ………………….you go to bed ? I go to bed at 9.30

A. How B. What time C. What D. Where

14. Nam looks worried because he sometimes …………………………..to brush his teeth.

A. forgetting B. forgets C. to forget D. forget

15. Come and …………………………..table tennis, Ba .

A. play B. go C. do D. take

16.I know how to take care……………….. myself.

A. of B. about C. on D. off

17. Many people just sit and………………TV all the evening .

A. see B. watch C. look for D. look at

18. Lan / speak / English / well

A. Lan can speaks English well B. Lan can speaking English well.

C. Lan can to speak English well D. Lan can speak English well.

19. Is there a cure……………………..the common cold ?

A. from B. at C. for D. in

20. Hoa enjoys…….books very much.

A. to read B. read C. reads D. reading

II. Đọc kỹ bài khóa sau và chọn phương án đúng ( ứng với A,B,C hoặc D) cho các câu từ 21 đến câu 25:

Thomas Edison was a famous scientist. He was born in 1874 and died in 1931. He invented the electric bulb. He also made the world’s first gramophone.

When he was a boy at school, Edison asked a lot of questions. The teacher thought he was stupid and sent him home. Edison’s mother taught him at home and he began to carry out a lot of experiments. He earns money for his experiments by gardening. Later, he worked on a train and continued to experiment there. Unfortunately, in one of his experiments, he set fire to the train.

21. Thomas Edison was a famous……………..

A. doctor B. scientist C. teacher D. engineer

22. How old was he when he died ?

A. He was 81 years old when he died. B. He was 84 years old when he died.

C. He was 82 years old when he died. D. He was 83 years old when he died.

23. He invented…………………….

A. the electric light bulb B. the telephone C. the sewing machine D. the television

24. His teacher thought he was……………………….

A. intelligent B. generous C. stupid D. hard- working

25. Who taught him at home /

A. His brother taught him at home. B. His father taught him at home.

C. His mother taught him at home. D. His sister taught him at home.

III/.Đọc đoạn văn sau và chọn từ thích hợp ( ứng với A,B,C hoặc D ) để điền vào chỗ trống từ câu 26 đến câu 35 .

Video games

Millions of young people play video games. Some …………..them at home, others play them …………..arcades. The ……….of the games become very rich. Some of the inventors are as young as 14 or 15. These games are good fun, but players must be…………. They should not …………much time on these games because they can become tired or dizzy. Sometimes, players spend too much time on their own ………..they like to play video games so much. One doctor says” This is very bad for children. They must …………..activities with others. All children should play outdoors and develope ……………social skills. They should be with people of their own age. Children should spend only a small part of their free time …………….. video games. They mustn’t forget ………………..other things too.”

26. A. do B. did C. plays D. play

27. A. in B. on C. at D. for

28. A. inventing B. invented C. inventors D. invention

29.A. careless B. careful C. inventors D. invention

30.A. use B.get C. take D. spend

31.A. so B. but C. because D. and

32. A. taking part in B. to take part in C. takes part in D. take part in

33. A. our B. his C. their D. her

34. A. playing B. play C. to play D. plays

35. A. to do B. do C. doing D. does

IV/.Xác định từ / cụm từ có gạch dưới cần phải sửa để câu sau trở thành chính xác:

36. Life is different on the city.

A B C D

37. How long is it from your house to school ?

A B C D

38. Ba doesn’t go to school last Sunday .

A B C D

39. Ba ought to doing his homework first.

A B C D

40. My brother always plays volleball skillful.

A B C D

Viết lại câu mà nghĩa không đổi.

1.He runs quickly.

= …………………………………

2.They are good teacher.

=………………………………..

3.What is your name?

=………………………………….

4.How old are you?

=………………………………....

5.How much is this dress?

=…………………………………