They overcame all the difficulties and finished the plan seven days ahead of schedule,( )was something we had not expected.

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问题 They overcame all the difficulties and finished the plan seven days ahead of schedule,( )was something we had not expected.

选项 A、it
B、that
C、what
D、which

答案D

解析
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本试题收录于: 英语题库普高专升本分类
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