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题目
题型:不详难度:来源:
--- I wonder how much you charge for your service.
--- The first two are free ______ the third costs $30.
A.whileB.untilC.whenD.before

答案
A
解析
考查连词。While 意为然而,表对比, until直到  when当……时候  before在之前
句意为,---我想知道你的服务要收多少钱?
-----前面两个免费,然而第三个要三十美元。
核心考点
试题【--- I wonder how much you charge for your service. --- The first two are free __】;主要考察你对连词等知识点的理解。[详细]
举一反三
It doesn’t matter ________ you pay by cash or credit card in this store.
A.howB.whether
C.whatD.why

题型:不详难度:| 查看答案
He smiled politely ______ Mary apologized for her drunken friends.
A.asB.if
C.unlessD.though

题型:不详难度:| 查看答案
A number of high buildings have arisen _______ there was nothing a year ago but ruins.
A.whenB.where
C.beforeD.until

题型:不详难度:| 查看答案
It is by no means clear      the president can do to end the strike.
A.howB.which
C.thatD.what

题型:不详难度:| 查看答案
I don"t believe we"ve met before,         I must say you do look familiar.
A.thereforeB.although
C.sinceD.unless

题型:不详难度:| 查看答案
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