{01} It was quite a long time ______ I figured out what had happened to the manager.
A.after
B.before
C.when
D.since
解析: 试题分析:句意:有很长时间我才弄清经理发生了什么。这句话用了固定句型:It was+一段时间+before+从句,表示“过了很长时间才/就….”如果是It is+一段时间+since…,自从…有多久了,选B。 本题选B。 {02}Of all the books on the desk, _____is of any use for our study.
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