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thanhthao1708
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a)Tìm GTNN của 1)D=|x-1|+|x-2|+|x-3|+|x-4| 2)E=|x+1|+|x+2|
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làm phần nào cũng được, giúp mình với sáng mai mình học rồi Choose the one word or phrase -a, b, c, or d- that best completes the sentences. 16. If the technology _______ available, we would be able to expand the business. a. would become b. were become c. had become d. Became 17. If the North Sea _______ in winter, you could walk from London to Oslo. a. happened to freeze b. froze c. should freeze d. should happen to freeze 18. It would have been a much more serious accident _____ fast at the time. a. was she driving b. had she been driving c. she had driven d. if she drove 19. If you _______ to my advice in the first place, you wouldn't be in this mess now. a. listen b. will listen c. had listened d. listened 20. I'll give you a lift if it _______. a. is raining b. rained c. will rain d. had rained 21. If I _______ a more reliable car, I ' _______to Spain rather than fly. a. would have - would drive b. had - had driven c. had - would drive d. would have had - would drive 22. I _______ you sooner had someone told me you were in the hospital. a. would have visited b. had visited c. visited d. visit 23. They couldn't decide _______ it was worth re-sitting the exam. a. if b. whether c. if or not d. whether not 24. _______ how difficult the job was, I mightn't have taken it. a. If I know b. If I would know c. Did I know d. Had I known 25. ____ in my seventies and rather unfit, I might consider taking up squash. a. Were I not b. Was I not c. Weren't I d. If I am not C. Identify the one underlined word or phrase -A, B, C or D-that must be changed for the sentence to be correct. 26. Some scientists believe that the earth have resources enough A B to support its population. C D 27. The population of the world has been increased faster and faster. A B C D 28. Ninety-seven percent of the world' water is saltwater is found in A B C the oceans of the Earth. D 29. Hadn't he resigned, we would have been forced to sack him. A B C D 30. John lived in New York since 1960 to 1975, but he is now living in Detroit. A B C D

41) The man about ____ I was telling you is standing over there. A. who B. that C. whom D. All are correct 42) The woman ____ Ann must take care of is very poor and old. A. whom B. that C. who D. All are correct 43) This is the man to ____ I gave some money this morning. A. who B. whom C. that D. All are correct 44) This is the result of our work ____ I’m pleased with. A. that B. whose C. which D. A & C are correct 45) The problem in ____ we are very interested has been discussed in class. A. that B. whom C. which D. A & C are correct 46) The boy ____ you made fun of yesterday is my cousin. A. who B. whom C. that D. All are correct 47)Ann, ____ lives next door, is very friendly. A. who B. whom C. that D. All are correct 48) We went to Sandra’s party, ____ we enjoyed very much. A. which B. whom C. that D. who 49) John, ____ I have known for a very long time, is one of my closest friends. A. whose B. whom C. that D. B & C are correct 50) Sheila, ____ job involves a lot of travelling, is away from home a lot. A. whose B. whom C. that D. which 51) This new stadium, ____ can hold 90,000 people, will be opened next month. A. that B. whose C. which D. A & B are correct 52) My brother, ____ lives in Houston, is a doctor A. who B. whom C.that D. A & B are correct 53) My office, ____ is on the second floor, is small. A. whose B. which C. who. .D. A & B are correct 54) She told me her address ____ I wrote down on a piece of paper. A. which B. that C. whose D. A & B are correct 55) The sun, ____ is one of millions of stars in the universe, provides us with heat and light. A. which B. that C. who D. A & B are correct 56) Tom made a number of suggestions, most of ____ were very helpful. A. them B. which C. that D. B & C are correct 57) Mary has three brothers, all of ____ are married. 60) The meeting ………I went was interesting. A. to which B. which C. that D. B & C are correct 58) We were given a lot of information, most of ____ was useless. A. which B. it C. that D. All are correct 59) There were a lot of people at the party, only a few of ____ I had met before. A. them B. whom C. who D. B & C are correct 60) I sent her two letters, neither of ____ she has received. A. that B. these C. which D. whom

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