题目内容
They were about to stop paddling __________ the raft turned over. All of them were thrown into the river with shouts and screams.
[ ]
A. while
B. as
C. when
D. before
答案:C
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题目内容
They were about to stop paddling __________ the raft turned over. All of them were thrown into the river with shouts and screams.
[ ]