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单项选择题

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

A. Mars has different seasons.
B. There are no seasons on Mars.
C. There’s a lot of rain on Mars.
D. Its summer is very hot at night.
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单项选择题A. Because he has to work during the day. B. Because night classes will cost him less money. C. Because he wants to quit his job as a computer programmer. D. Because he wants to get a degree in education.

A. Because he has to work during the day.
B. Because night classes will cost him less money.
C. Because he wants to quit his job as a computer programmer.
D. Because he wants to get a degree in education.

单项选择题A. Jim has to grade the papers this time. B. Jim hasn’t started to grade the papers. C. Jim didn’t grade the papers himself this time. D. Jim always asks his assistant to grade the papers.

A. Jim has to grade the papers this time.
B. Jim hasn’t started to grade the papers.
C. Jim didn’t grade the papers himself this time.
D. Jim always asks his assistant to grade the papers.