单项选择题

Questions 18～21 are based on the following dialogue.
What major benefit does the woman think to use waste paper

A．The quality of paper will be improved.
B．Paper prices will go down.
C．Garbage dumps will decrease in size.
D．More trees will be preserved.

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单项选择题

单项选择题

Questions 18～21 are based on the following dialogue. What major benefit does the woman think to use waste paper 您的浏览器不支持 audio 元素。