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⑴My brother is under the tree. A.
⑵I'm listening to music. B.
⑶Look at the children. They are rowing a boat. C.
⑷I'm hungry, Mum. Can I have a cake? D.
⑸Sam can run very fast. E.
—What are you doing?
—I'm .
A B C 改为
—What is he doing?
—He is music.
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