修改病句:they are climb the hills. what are you do now? look!the little duck swim in the pond.快啊

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修改病句:they are climb the hills. what are you do now? look!the little duck swim in the pond.快啊
修改病句:they are climb the hills. what are you do now? look!the little duck swim in the pond.
快啊

修改病句:they are climb the hills. what are you do now? look!the little duck swim in the pond.快啊
1 climb-> climbing
2 do-> doing
3 swimming - > is swimming
加油!不明白再问!