单项选择题


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

A．Bad weather.
B．The large size of airplanes.
C．Mistakes by air traffic controllers.
D．Crowded air traffic.
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单项选择题
A．The way to ensure the survival of the human race on Venus.B．The way to breed organisms on Venus.C．The way to reduce the population of the Earth.D．The way to conquer the universe.
A．The way to ensure the survival of the human race on Venus.
B．The way to breed organisms on Venus.
C．The way to reduce the population of the Earth.
D．The way to conquer the universe.
单项选择题
A．Judging people’s behavior.B．Changing people’s attitudes.C．Common causes of anger.D．The effects of negative behavior.
A．Judging people’s behavior.
B．Changing people’s attitudes.
C．Common causes of anger.
D．The effects of negative behavior.
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