题目内容

7.-I wonder how much you charge for your services.
-The first two are free_____the third costs 30.(  )
A.whileB.untilC.whenD.before

分析 --我想知道你的服务收费多少.
--最初的两次免费,而第三次30元.

解答 答案是A.本题考查从属连词辨析.While然而,表示两者间的对比转折;until到…为止; when 当…时;before 在…之前,根据题意可知,前两次和第三次进行对比,故选A.

点评 首先要理解连词的功能:并列连词连接并列的词、短语或句子;从属连词连接主从句;其次理解各连词含义;最后结合语境做出判断.

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71.The author presents this passage byD.
A.telling an interesting story
B.describing an activity in a lively way
C.testing an idea by reasoning
D.introducing a practical method.

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