一Why didn’t you try your best to get on the bus?一I tried to，but ______ I could，i

题干

一Why didn’t you try your best to get on the bus?
一I tried to，but ______ I could，it started moving．

A．until

B．when

C．before

D．after

上一题下一题 0.85难度单项选择更新时间:2011-12-15 11:49:54

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