单项选择题

Questions 11 to 18 are bused on the conversation you have just heard.

A．John is a fast worker.
B．John did Jack’s homework.
C．John has not finished his homework.
D．John didn’t do the homework on his own.

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单项选择题

单项选择题

Questions 11 to 18 are bused on the conversation you have just heard. 您的浏览器不支持 audio 元素。