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它正在干什么？
它在飞。
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猜一猜小动物在干什么？
A:What is it doing?
B:It is playing.
A:What is it doing?
B:It is jumping.
A:What is it doing?
B:It is eating.
A:What is it doing?
B:It is swimming.
A:What is it doing?
B:It is running.
A: What is it ?
B: It is a …
A: What is it doing?
B: It is …
（两人合作对话）
.
A: What is it ?
B: It is a …
A: What is it doing?
B: It is …