----You seem to have known Dr Smith for a long time.---- That’s true. ______ he

题干

----You seem to have known Dr Smith for a long time.
---- That’s true. ______ he joined our club six years ago.

A．Since

B．Until

C．When

D．Before

上一题下一题 0.94难度单项选择更新时间:2011-11-01 03:01:06

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