How long do you think ______ the Microsoft brings out a new product?

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• 1It was the first time Mary _________ such a big opening ceremony.

  A.has attended

  B.attended

  C.had attended

  D.should attend

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• 2Tom was about to close the window ________ his attention was caught by a bird.

  A.when　　　

  B.if

  C.and　　　

  D.till

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• 3________full use of the chance, or you will never achieve your dream of overseas study.

  A.Making

  B.To make

  C.Make

  D.To be made

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• 4Another drug that has helped improve people's health is penicillin, _________ is _________ by many _________ one of the most important medicines.

  A.which, considered, being

  B.that, considering, been

  C.that, to consider, being

  D.which, considered, to be

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• 5 ________ ,the more quickly he will learn a foreign language.

  A.The stronger motivation will a person have

  B.The stronger motivation has a person

  C.The stronger motivation a person will have

  D.The stronger motivation a person has

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• 6The Great wall is known ________ the world.

  A.for

  B.as

  C.on

  D.to

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• 7-----Is this the first time you _____Chengdu ? -----No. But the first time I _____here, the city wasn't so beautiful.

  A.visited, came

  B.visited, have come

  C.have visited, have come

  D.have visited, came

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• 8Believe it or not ,our house isn't ______ their new house bought last month.

  A.half as large as

  B.as half large as

  C.as large as half

  D.large as half as

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• 9Much to his surprise，he invited only twenty friends to the dinner，but ________ came．

  A.twice as many as

  B.as many as twice

  C.twice as many

  D.twice more than

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• 10Loulan is believed __________ over by sandstorms gradually from AD200 to AD400.

  A.to cover

  B.to be covered

  C.to have covered

  D.to have been covered

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