单项选择题


Passage One
Questions 26 to 29 are based on the passage you have just heard.

A．Because people might have to migrate there someday.
B．Because it is very much like the earth.
C．Because it is easier to explore than other planets.
D．Because its atmosphere is different from that of the earth.
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单项选择题
A．A new fuel for buses.B．The causes of air pollution.C．Careers in environmental engineering.D．A way to improve fuel efficiency in buses.
A．A new fuel for buses.
B．The causes of air pollution.
C．Careers in environmental engineering.
D．A way to improve fuel efficiency in buses.
单项选择题
A．She hasn’t called the travel agency yet.B．The man may have to reschedule his trip.C．She doesn’t know when her semester ends.D．The man should take his vacation somewhere else.
A．She hasn’t called the travel agency yet.
B．The man may have to reschedule his trip.
C．She doesn’t know when her semester ends.
D．The man should take his vacation somewhere else.
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