问题
选择题
--Why don't you try your best to get on the bus?—I tried to , but I could, it started moving.
A．until
B．when
C．before
D．after
答案
答案：C
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--Why don't you try your best to get on the bus?—I tried to , but I could, it started moving.
A．until
B．when
C．before
D．after
答案：C