The old man ____ down by a truck is being saved now. A．knockingB．to knockC．knock_刷题宝

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The old man ____ down by a truck is being saved now.

A．knocking

B．to knock

C．knocked

D．being knocked

上一题下一题 0.64难度单项选择更新时间:2013-10-31 07:27:42

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