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.
. ---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
略
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