All the flights____because of the snowstorm,we had to take t

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/19 15:17:27

All the flights____because of the snowstorm,we had to take the train instead.
A.were canceled B.had been canceled C.having canceled D.having been canceled
D独立主格
为啥不是B
不用独立结构不行吗?

我觉得如果是分开的两句话,或者口语的话B没错.但是如果是书面用语,两个相互独立句子要成一句话必须用连词连接起来,或者so,或者therefore,但是题目中没有连词,所以此题只能用独立主格结构,即D.

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