{01}It seemed only seconds ________ the boy finished washing his face.
A.the moment
B.since
C.after
D.before
解析: 试题分析:考查状语从句。it is + 时间段 + before + 句子 的含义是“不久……就……”。故选择答案D。句意:男孩似乎只花了几秒钟就洗好了脸。A一...就....,B自从。。。以来C在。。。之后D在。。。之前,没过多久就,趁。。。还未。 本题选D。 {02}_________ caused the accident is still a mystery.
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