单项选择题


Questions 19 to 22 are based on the conversation you have just heard.

A．Discovering new life in space.
B．Studying meteorites.
C．Plotting the courses of asteroids;
D．Developing radar telescopes.
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单项选择题
What kind of animal affected by man-made chemicals is not referred in the passage
A．Polar bears.
B．People.
C．Mammals.
D．Birds.
单项选择题
A．He dislikes museums and galleries.B．He does not care about the weather.C．Going to the beach is the best choice.D．He doesn’t want to go to Washington.
A．He dislikes museums and galleries.
B．He does not care about the weather.
C．Going to the beach is the best choice.
D．He doesn’t want to go to Washington.
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