问题描述：
The girl often helps the old man _____water .A.carrying B.carries C.to carry D is carrying 分别说
The girl often helps the old man _____water .A.carrying B.carries C.to carry D is carrying 说明下解题思路 还有4个选项分别用在哪里!
The girl often helps the old man _____water .A.carrying B.carries C.to carry D is carrying 说明下解题思路 还有4个选项分别用在哪里!
问题解答：
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