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It is not until recently ______ the scientists have found proof of there being water on Mars.
A.whenB.thatC.howD.what

答案
B
解析

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试题【It is not until recently ______ the scientists have found proof of there being w】;主要考察你对连词等知识点的理解。[详细]
举一反三

He warmly congratulated them on _____ they had achieved in science and technology.
A.thatB.whereC.whatD.which

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Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.
A.though B.ifC.sinceD.until

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_____ he is very busy, he spends at least two hours every day surfing the Internet in order to find out the latest development in science and technology.
A.Even though B.WhenC.UnlessD.Whether

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___ she will come or not depends on her mood. 
A.WhetherB.IfC.WhenD.That

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There is nothing ___ two chairs in the room.
A.besideB.butC.except thatD.of

题型:不详难度:| 查看答案
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