—Hello, can I speak to Mr. Smith?—I’m sorry, but it is 3 weeks _____ he worked h

题干

—Hello, can I speak to Mr. Smith?
—I’m sorry, but it is 3 weeks _____ he worked here.

A．before

B．since

C．after

D．while

上一题下一题 0.64难度单项选择更新时间:2012-12-29 09:51:49

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