Scientists also have no idea how long it will be before all wild animals in the
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Scientists also have no idea how long it will be before all wild animals in the cages _____. A.should be set free | B.will be set free | C.are set free | D.would be set free |
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答案
C |
解析
试题分析:考查动词的时态与语态。句意:科学家们也不知道需要过多久笼子里的野生动物才能被放出来。It will be +some time +before+…+does/do 例句: It will be one and a half years before I leave school.还有一年半时间我就要毕业了。t was +some time +before 过了多久才 例句:It wasn’t long before he told me that. 没过多久他就把那件事告诉我了。再根据set free 与 wild animals之间是被动关系,所以选C项。 考点 : 考查动词的时态与语态 |
举一反三
She ______ 21 in June.A.becomes | B.gets | C.grows | D.turns |
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The trouble with such resources as coal, oil and gas ______ that they are not renewable.A.was | B.are | C.have been | D.is |
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He ______ a book about his adventures in Tibet. I hope he can find a good publisher when it is finished.A.was writing | B.wrote | C.has already written | D.is currently writing |
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—The constant noise around here______ me crazy! —Calm down.It’s no use complaining.A.drove | B.drives | C.is driving | D.had driven |
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—Will you attend the meeting this afternoon? —But I ________ told anything about it.A.haven"t been | B.am not | C.wasn"t | D.won’t be |
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