một xe máy đi từ A đến B với vậy tốc là 30km/h. Cừng lúc đó một xe ô tô đi từ A đến B với vận tốc lớn hơn xe máy là 20km/h. Tính quãng đường AB biết tổng thời gian của xe máy và ô tô là 48 phút

Chứng minh : \(\left(x-1\right)\left(x-3\right)\left(x-4\right)\left(x-6\right)+9\ge0\)

Chứng minh : \(a^2+4b^2+3c^2>2a+12b+6c-14\)

Chứng minh : \(\left(ab+cd\right)^2\le\left(a^2+c^2\right)\left(b^2+d^2\right)\)

Complete the second sentence so that it has a similar meaning to the first sentence using the word given. Do not change the word given. You must use BETWEEN TWO AND FIVE WORDS including the word given (1.0 point)

66. The karate class is so fantastic that we’re going again next week.

SUCH It is .................................................................that we’re going again next week.

67. It was wrong of you to allow a four-year-old child to walk home alone.

ALLOWED You should ................................................a four-year-old child to walk home alone.

68. I could hold a big party due to my Mom’s help.

BEEN Had it .......................................... my Mom’s help, I could not have held a big party.

69. They repaired my car at the garage in town.

HAD I ........................................................................ at the garage in town.

70. Some people have complained about the noise.

SEVERAL There have .......................................................................about the noise.

71. I didn’t know anything about Rosa’s problem at work.

UNAWARE I ......................................................................... Rosa’s problem at work.

72. I’d rather not go out this afternoon.

FEEL I ............................................................................................ out this afternoon.

73. She has been working here since she was 20.

WHEN She .......................................................................................she was 20.

74. I don’t know why Paul left the classroom so suddenly.

MADE I don’t know .................................................................the classroom so suddenly.

75. Tom passed the test easily.

DIFFICULTY Tom had ……………………………….…………………….the test.

. Circle A, B, C or D next to the word or phrase which best completes each sentence below (1.5 points)

6. Mary stopped swimming and just _________ on the surface.

A. sank B. floated C. dived D. poured

7. It is very important that students have full ________ to all library facilities, including multimedia and group-work rooms.

A. access B. license C. update D. agreement

8. The man ______________ a grey suit works in the bank near our house.

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

9. Caroline is definitely _______ of those two girls.

A. smarter B. smart C. the smarter D. the smartest

10. Peter: It was very kind of you to invite us to your party!

Mary: ________

A. It’s my pleasure B. No, thanks C. Ok. That’s great D. Good idea, thanks

11. Michael ___________ be watching TV now. I just saw him outside some minutes ago.

A. mustn’t B. shouldn’t C. can’t D. won’t

12. Not until ________ her did I realize how beautiful she was.

A. saw I B. did I see C. I did see D. I saw

13. It has been raining all day. This weather makes me__________.

A. depressed B. depressing C. depress D. depression

14. Everyone is ready, _________?

A. isn’t he B. isn’t she C. aren’t they D. are they

15. “_________ do you participate in extracurricular activities?” - “Never”

A. What B. How much C. How long D. How often

16. Could you recommend me a shop ________ I can buy a reliable laptop?

A. which B. where C. who D. that

17. He hurried __________ he wouldn’t be late for school.

A. since B. so that C. although D. because

18. Peter _________ to the operating theatre when the police arrived and arrested him.

A. was taking B. was taken C. had taken D. was being taken

19. This is the third time James _______ the volunteer program to the village.

A. joined B. joins C. has joined D. is joining

20. Professor Alan insisted that every student __________ their report by Friday.

A. finish B. finishes C. finished D. to finish

Circle A, B, C or D next to the word whose underlined part is pronounced differently from those of the other words (0.5 point)

Câu 1 : Em hãy đọc và giải thích số liệu kĩ thuật sau

a) Bóng đèn ghi : 220V và 40W

b) Quạt điện ghi : 110V và 80W

c) Nồi cơm điện : 120V và 1000W

Câu 2 : Em hãy tính toán điện năng tiêu thụ trong 1 tháng của 1 họ gia đình ( điện năng tiêu thụ hằng ngày là như nhau ) và tính toán số tiền phải trả, biết răng 1kwh = 1200 đồng

- làm hộ mềnh vớiiii

Find one mistake và sửa lại

1. They haven't visited us when they moved here

2. John asked me how long did it take me to get to his village

3. Everyone say that he's now enormously rich

4. We'll never catch them up if you walk as slow as that.

Find the mistake and corect the mistake

1. The doctor advied