It won't take long to clean the rooms for the children if we all volunteer ．_刷题宝

题干

It won't take long to clean the rooms for the children if we all volunteer ．

A：helping

B：to help

C：help

D：to helping

上一题下一题 0.0难度选择题更新时间:2018-11-18 06:37:25

答案(点此获取答案解析）

B

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