The field research will take Joan and Paul about five months; it will be a long time _________ we me...
2022-12-07 07:54:48 104次 2014届湖南耒阳二中高三第一次月考英语卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The 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
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