It was five o'clock in the morning _ they climed up to the top of the mountain.A.since B.when C.that D.until

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It was five o'clock in the morning _ they climed up to the top of the mountain.A.since B.when C.that D.until
It was five o'clock in the morning _ they climed up to the top of the mountain.
A.since B.when C.that D.until

It was five o'clock in the morning _ they climed up to the top of the mountain.A.since B.when C.that D.until
选B when ,时间状语从句.如果想选C,变成成强调句的话, five o'clock in the morning 前要加个介词at,强调时间状语,这里没有介词.所以还是乖乖选B吧

B.when
当他们爬上山顶时,是早上5点。A.since 在句子中,作连词用,自从,主句现在完成时,从句用一般过去时。C.that 题目是时间状语从句,that不是时间状语从句的连接词。 D.until 直到....为止,主句的动作一直持续到从句动作发生。它要求主句的谓语动词必须是持续性动词。...

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B.when
当他们爬上山顶时,是早上5点。A.since 在句子中,作连词用,自从,主句现在完成时,从句用一般过去时。C.that 题目是时间状语从句,that不是时间状语从句的连接词。 D.until 直到....为止,主句的动作一直持续到从句动作发生。它要求主句的谓语动词必须是持续性动词。

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