问题
选择题
It was quite a long time ______ I figured out what had happened to the manager.
A．after
B．before
C．when
D．since
答案
答案：B
题目分析：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。
