单项选择题


Why must air be pumped into the plane

A．The plane can’t fly without air.
B．The plane needs air for its refueling.
C．It meets the passengers’ needs.
D．It meets the pilots’ needs.
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What is the woman’s first suggestion to her hus-band
A．He should start with a light workout.
B．He should go to have a check-up.
C．He should eat less fatty foods.
D．He should visit a fitness trainer.
单项选择题
According to the speaker, what problem may indoor air pollution bring to people
A．They may feel exhausted.
B．They may feel very nervous.
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