题目内容
The famous scientist was going out _____ he found himself surrounded by lots of young people.
A.when |
B.before |
C.while |
D.after |
【答案】
A
【解析】略
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题目内容
The famous scientist was going out _____ he found himself surrounded by lots of young people.
A.when |
B.before |
C.while |
D.after |
A
【解析】略