填空题

What should we do to stay healthyOne important role is （）.

【参考答案】

to exercise often

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单项选择题

A．About a day.
B．About two days.
C．About a week.
D．The speakers don’t tell us.

填空题

I would rather you (come)（） yesterday.

What should we do to stay healthyOne important role is （）. 您的浏览器不支持 audio 元素。