The field research will take Jim and Tom about ten months: it will be a long time______we meet them again.

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问题 The field research will take Jim and Tom about ten months: it will be a long time______we meet them again.

选项 A、after
B、before
C、since
D、when

答案B

解析 本题考查连词的使用。题干的意思为“吉姆和汤姆的实地考察需要花10个月时间.我们又会有很长时间不能见面”。所以选B项。“since”一般与完成时态连用。
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