They overcame all the difficulties and completed the project two months ahead of

游客2023-10-27  20

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 答案为A。本句的后半部分为非限定性定语从句,用来代替前文的内容,要由关系代词which引导。
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