看图读一读，把句子代码填入相应的括号里

A. —Is Ann reading a book? —No, she isn't. She's making a sandcastle.

B. Look at Tom. He is walking (走路）on the beach. He is very hot.

C. —Are the children collecting shells on the beach?—Yes, they are.

D. Look at John and Lily. They are flying kites in the park. They are happy.

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