单项选择题

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

A．Its chemical elements must be studied.
B．Its temperature must be lowered.
C．Big spaceships must be built.
D．Its atmosphere must be changed.
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Why is Gates constantly worded about the future of Microsoft
单项选择题
A．Her car is being repaired.B．Parking is difficult in the city.C．The cost of fuel has increased.D．She wants to help reduce pollution.
A．Her car is being repaired.
B．Parking is difficult in the city.
C．The cost of fuel has increased.
D．She wants to help reduce pollution.
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