2. 外语
  3. They overcame all the difficulties and completed the project two months ahead of time, ______ is something we had not expected.

They overcame all the difficulties and completed the project two months ahead of time, ______ is something we had not expected.

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问题 They overcame all the difficulties and completed the project two months ahead of time, ______ is something we had not expected.
选项 A、which
B、it
C、that
D、what
答案A
解析 which引导的修饰整个主句的非限制性定语从句，一般是对主句的内容作进一步的说明，相当于一个并列分句，此时which可用and this代替，例如：She married Joe，which surprised everyone．她嫁给了乔，这使大家都感到意外。Liquid water changes to vapor，which is called evaporation．液态水变为蒸汽，这个过程叫作蒸发。Friction wears away metal of the moving parts，whi
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