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 |
B
解析试题分析：句意：Joan 和Paul将要进行为期5个月的实地研究，因此我们需要很长的时间才能与他们见面。before连词，表示“在...之前”。这里的意思是，在我们见面之前，琼和保罗需要工作5个月的时间。由此判断选B。
考点：考查it句式连接词在语境中的用法。
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