Một cano xuôi dòng từ bến A đến bến B với vận tốc trung bình 30km/h. sau đó lại ngược dòng từ B về A. Thời gian đi xuôi dòng ít hơn thời gian đi ngược dòng là 40 phút. Tính khoảng cách giữa hai bến A và B, biết vận tốc dòng nước là 3km/h và vận tốc thực của cano không thay đổi.

 

21. She’d love to go to the party, but she had to _______ the baby in the evening.A. turn on B. swith off C. look after D. turn off22. Would you mind _______ me put these chairs away? A. helping B. helped C. to help D. help23. He drives _______ than he used to. A. carefully B. more careful C. careful D. more carefully24. Mr.Smith, _______ has a lot of teaching experience, will join the school in September.A. who B. which C. that D. whom25. This newspaper _______ every day.A. is publishing B. publishes C. publish D. is published26. All people should join hand in protecting the environment _______ we can gain better health.A. in order that B. when C. because D. even though27. If you eat too quickly, you may not _______ attention to whether your hunger is satisfied.A. pay B. take C. keep D. show28. If children don’t play sports, they _______ sleepy and tired.A. would feel B. will feel C. would have felt D. had felt29. Our plane arrives in Hanoi at _______ two o’clock in _______ afternoon.A. Ø – the B. the – the C. a – a D. the – an30.  A _______ is usually necessary when you travel overseas.A. passport B. driving licence C. birth certificate D. degree31. They are going to spend their holiday _______ rural France.A. relaxing B. exploring C. reserving D. searching32. Excuse me, how much is a _______ to New York?A. ticket return B. returning ticket C. return ticket D. ticket returning33. He warned her _______ the wire.A. not touching B. not touch C. touch D. not to touch34. When Jack _______ me, I _______ a letter.A. phoned/ has been writing B. has phoned/ was writingC. phoned/ was writing D. was phoning/ wrote35. Because of the coming examination, I am under a lot of _______.A. responsibility B. pressure C. confidence D. activities36. The academic year in England _______ into three terms.A. has divided B. is divided C. divides D. is dividing37. Thousands of people _______ homeless after the earthquake and tsunami in Japan a few months ago.A. are becoming B. will become C. become D. became38. Some students tend to choose block A, _______ others tend to choose block D.A. so that B. since C. whereas D. even if39. _______ the salary meets my expectations, I will accept the job offer.A. Therefore B. So C. If D. Although40. She is disappointed at not passing the GCSE examination, but I consider she will _______ it.A. fill in B. get over C. take after D. turn off41. John, who is now 16, is not _______ to apply for the Identify Card.A. very old B. enough old C. so old D. old enough 42. “Remember to take _______ your hat when you come in a Japanese house.”A. after B. off C. up D. apart43. Tom told us that sometimes he had difficulty _______ his feelings.A. expressing B. communicating C. sending D. talking44. My closest friend is not very _______ and she likes having a small friend group but I like talking with a lot of people and hanging out.A. society B. sociable C. social D. socialistic45. They _______ a five-day tour in Malaysia before they enjoyed the Tet festival last year.A. had spent B. would spend C. spend D. spent46. The Conical Leaf Hat is used like an umbrella to protect people _______ rain or sun.A. about B. off C. from D. to47. My teacher _______ writing with his left hand whenever he stands on the right of the board.A. used B. is using C. used to D. is used to48. When I came to the party, Sally and Tom _______.A. were dancing B. are dancing C. have danced D. danced49. The 22nd SEA Game were well prepared and successfully _______ although it was the first time Vietnam hosted.A. organization B. organize C. organized D. organizational50. There is a _______ of employment opportunities in a city.A. type B. variety C. group D. change
giup minh 30 cau nay voi