问题

They stayed with me three weeks,______ they drank all the wine I had[ ]

A: which
B: which time
C: during which time
D: during which

正确答案是：

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下列各句中，没有语病的一句是

The reporter has written__________articles about air pollution hoping to call the attention of all people to the problem.[ ]

_ it goes on, hour ________hour

It is generally considered to be of　　　a person follow good examples

The lecturer waited for the laughter to ______ before he could speak again.[ ]