选择单词，并用合适的形式完成对话。
A: Hello, Helen. ________ _________ ,please .
B: All right, ________ ________ on the desk?
A: You can have ________ ________ .
B: Oh, a nice monkey. Is ________ your monkey?
A: No, it isn't.
B: ________ ________ is it?
A: It's my ________'s.
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