{01}This approach, ______ more expensive than the basic one, provides us with considerably more usage flexibility.
A.as
B.since
C.while
D.if
解析: 试题分析:考查连词。A.as因为,一边...一边,尽管(要用倒装)B. since既然,自从...以来C.while当...时候,尽管D.if如果。句意:这种方法,尽管比基本方法更昂贵,但我们提供了更多的使用灵活性。故选C 点评:不同的连词要放在上下文中进行考查,要注意一词多义,如本题中as ,while均有“尽管”之意,但as要用倒装,while不能用倒装。 即学即练:We need some more facts and figures __________ we take the final decision. A. since B. before C. after D. until 选B 本题选C。 {02}—Won"t you go shopping with your mother? —No.________ she promises to buy me a new sweater.
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