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题目
题型:不详难度:来源:
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 freeC.are set freeD.would be set free

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
核心考点
试题【 Scientists also have no idea how long it will be before all wild animals in the】;主要考察你对一般现在时等知识点的理解。[详细]
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