_____ the ladder, get someone to hold it.A．When climbed 　　　　　　　　　B．When to climb_刷题宝

题干

_____ the ladder, get someone to hold it.

A．When climbed	B．When to climb
C．When climbing	D．When one climbs

上一题下一题 0.85难度单项选择更新时间:2010-06-30 09:12:40

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