改错What are dogs and cats doing?They are runing and playing

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改错What are dogs and cats doing?They are runing and playing

What are dogs and cats doing? They are running and playing.
run的现在完成时要双写n+ing.

What are the dogs and cate doing?They are running and playing.

What are the dogs and the cats doing? They are running and playing.
加个the.特指某个狗和某个猫

RUN
要双写“n”再加ING
类似的词还有:sit set put begin ……