题目内容
10. I tried to persuade him to give up smoking but .
A. in time B. in reality
C. in vain D. in fact
10. C in vain意为"无用,徒劳",从题干中关键信息词but来看,句意应为"没有说服",因此, C项合乎题意。 in time意为"及时地;最后"; in reality相当于in fact ,都表示"实际上"
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