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第74页

信息发布者：

Liu Tao: Hello, Wang Bing. Look! Here is a blue sweater. Is it your sweater?

Wang Bing: No, it isn't. My sweater is black.

Liu Tao: Whose sweater is it?

Wang Bing: Maybe it's Mike's. You can ask him.

Liu Tao: Mike, is it your sweater?

Mike: Yes, it is. Thank you.