David is very helpful. He is always _______ others._刷题宝

题干

David is very helpful. He is always _______ others.

A：ready helping

B：ready help

C：ready to helping

D：ready to help

上一题下一题 0.0难度选择题更新时间:2017-01-10 03:56:53

答案(点此获取答案解析）

D

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