看图，完成对话。
A: ________ this?
B : It's a ________ .
A: Whose ________ is it?
B : Guess.
A: Is this ________ ________ ?
B : No, it's ________ my________. It's Helen's.
A : I see.
看图，完成对话。
A: ________ this?
B : It's a ________ .
A: Whose ________ is it?
B : Guess.
A: Is this ________ ________ ?
B : No, it's ________ my________. It's Helen's.
A : I see.
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