中文谷－Haveyouknowneachotherforlong?－Notverylong,
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问题详情：
－Have you known each other for long?
－Not very long, ____________ we started to work in the company.
A. after B. before C. when D. since
【回答】
D
知识点：连词
题型：选择题
标签：
Notverylong
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