题目内容
( ) 10.1 guess we've already talked about this before but I'll ask just .
A. on purpose B. for sure C. in case D. by chance
10. C考查介词短语的词义辨析。on purpose故意地;for sure确信;in case万一,以防;by chance偶然地,碰巧地。句意:我想我们以前谈过此事, 但是以防万一,我得再问你一次。
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