题目内容
--All the building materials have been washed away.
---So I have heard. But there was no sign ______ a heavy rain was on the way last night.
A. when B. If C. which D. that
D
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题目内容
--All the building materials have been washed away.
---So I have heard. But there was no sign ______ a heavy rain was on the way last night.
A. when B. If C. which D. that
D