he field research will take Joan and Paul about five months; it will be a long time we me

发布时间：2020-08-17 11:27:10

he field research will take Joan and Paul about five months; it will be a long time      we meet them again.
A. after
B. before
C. since
D. when

网友回答

A. after
(答案→)B. before
C. since
D. when
解析：该空表示在我们再见面之前要过很长时间，因此应填before引导时间状语从句。
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