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 他们克服一切困难，提前两个月完成了工程，这是我们没有料到的事。Which引导非限制性定语从句。因此正确答案是A。
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