The field research will take Joan and Paul about five months; it will be a long time _____ we meet t...
2022-11-13 03:13:48 64次 2015届天津滨海新汉沽第五中学高三上第二次月考英语试卷（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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