单项选择题


Questions 23 to 25 are based on the conversation you have just heard.

A．She is writing a competitive paper for a scholarship.
B．She is doing a paper.
C．She missed the lecture.
D．She is planning to attend the scholarship award ceremony.
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单项选择题
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.
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.
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.
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