—Have you seen your friend off ?—Yes. I watched the train leaving the station

题干

—Have you seen your friend off ?
—Yes. I watched the train leaving the station it disappeared from sight.

A．unless

B．as if

C．so that

D．until

上一题下一题 0.64难度单项选择更新时间:2013-01-22 08:23:53

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