单项选择题

Questions 29 to 31 are based on the passage you have just heard.

A．When he has to do his work on foot.
B．When he has to walk up and down stairs.
C．When he is sometimes greeted in an unpleasant way.
D．When he has a registered letter.

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单项选择题

A．Until he eats it.B．At least thirty minutes.C．All day.D．No more than thirty minutes.

A．Until he eats it.
B．At least thirty minutes.
C．All day.
D．No more than thirty minutes.

填空题

For journeys of up to 550 kilometers, planes are inferior to ______.

Questions 29 to 31 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Questions 29 to 31 are based on the passage you have just heard.