情景会话，选择正确答案。
Bob：Look, Tim! That is my mother.
Tim：____1____
Bob：She is a TV reporter.
Tim：Oh! ____2____
Bob：No, he isn't. ____3____
Tim：How interesting! ____4____
Bob：Yes.
情景会话，选择正确答案。
Bob：Look, Tim! That is my mother.
Tim：____1____
Bob：She is a TV reporter.
Tim：Oh! ____2____
Bob：No, he isn't. ____3____
Tim：How interesting! ____4____
Bob：Yes.
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