| 1. 难度：中等 | |
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Was it not until you began to work —— how much time you had wasted? A.did you realize B.that you realized C.did you not realize D.that you didn’t realize
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| 2. 难度：中等 | |
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One-third of the country____covered with trees and the majority of the citizens_______black people. A is；are B is；is C.are；are D.are；is
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| 3. 难度：中等 | |
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—Why does the lake smell terrible? —Because large quantities of water_______________. A.have polluted B.is being polluted C.has been polluted D.have been polluted
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| 4. 难度：中等 | |
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The factory used 65 percent of the raw materials,the rest of which saved for other purposes. A.is B.are C.was D.were
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| 5. 难度：中等 | |
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The most impressive sight in China，one of the wonders of the world，_____ the Great Wall. A.is B.are C.was D.were
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| 6. 难度：中等 | |
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Either you or one of your students___to attend the meeting__ tomorrow. A.are; to be held B.is；being held C.is; to be held D.are；having held
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| 7. 难度：困难 | |
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_____, Carolina couldn't get the door open. A. Try as she might B. As she might try C. She might as try D. Might she as try
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| 8. 难度：中等 | |
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Where go to spend our summer vacation this year? A.do you think can we B.do you think we can C.you think can we D.you think we can
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| 9. 难度：中等 | |
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Is that a book on farming?_______,I want to borrow it. A.So it is B.If so C.So is it D.So if
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| 10. 难度：中等 | |
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Generally speaking_______acording to the instructions，the drug has no side effect. A.when taking B.when taken C.when to take D.when to be taken
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| 11. 难度：中等 | |
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----Will you go to the party? ----Of course I will . A.if invited B.if having invited C.if I was invited D.if I will be invited
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| 12. 难度：中等 | |
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，please start the work tomorrow. A.If you are convenient B.If it is convenient for you C.If it is convenient of you D.If convenience
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| 13. 难度：中等 | |
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It is often________that human beings are naturally equipped to speak. A.said B.to say C.saying D.being said
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| 14. 难度：中等 | |
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—There is still a copy of the book in the library.Will you go and borrow_____? —No，I’d rather buy_____in the bookstore. A.it；one B.one；one C.one；it D.it；it
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| 15. 难度：简单 | |
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_____is our belief that improvements in health care will lead to a stronger, more prosperous economy. A.As B.That C.This D.It
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| 16. 难度：中等 | |
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We feel our duty to make our country a better place. A. it B. this C. that D. one
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| 17. 难度：中等 | |
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—It’s nice.Never before____ such a special drink! —I’m glad you like it. A.I have had B. I had C. have I had D. had I
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| 18. 难度：中等 | |
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--- He was nearly drowned once. --- When was _____? --- _____was in 1998 when he was in middle school. A.that; It B.this; This C.this; It D.that; This
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