They overcame all the difficulties and fulfilled the plan ten days ahead of sche

游客2024-01-14 7

问题 They overcame all the difficulties and fulfilled the plan ten days ahead of schedule, ______ was something we had not expected.

选项 A、that
B、this
C、it
D、which

答案 D

解析本题测试非限定性定语从句的用法。非限定性定语从句要用逗号与主句隔开，而且不能用that引导。用which引导的非限定性定语从句具有说明整个主句的作用。本句的意思是：“他们克服了所有的困难，比计划提前10天完成了任务，这真是出乎我们的意料。”因此，D为正确答案。

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