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14.她一直犹豫是否要做手术,直到医生确切地告诉她到目前为止手术没有失败过时,才下决心做手术. (assure)

分析 She hesitated (whether)to take/have/receive the operation (or not),so she didn't decide to take it/didn't make up her mind(to take it)until her doctor assured her that this kind of operation had never failed.

解答 根据句意可知用一般过去时.
本题句子结构比较复杂.巧妙运用not…until这个连接词,实质上是didn't decide to take it/didn't make up her mind(to take it),然后再用until将中间一部分"直到医生确切地告诉她到目前为止手术没有失败过时"连接起来,这里便涉及到中英文在句型和语言表达上面存在一定的顺序变化.assure后面用that引导的宾语从句.
hesitate to do sth意为"犹豫做某事",或者用whether to do (or not)作宾语,take/have/receive the operation意为"做手术".

点评 此题十分考验考生英语知识灵活度以及双语表达切换能力.

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