--What were you doing when the UFO arrived?--I the bus.A．wait forB．wai_刷题宝

题干

--What were you doing when the UFO arrived?
--I the bus.

A．wait for

B．waited for

C．am waiting for

D．was waiting for

上一题下一题 0.65难度单选题更新时间:2017-07-23 05:47:42

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