单项选择题

Questions 15-18

A. It influences the surface temperature of Mars.
B. It protects living beings from harmful rays.
C. It keeps a planet from overheating.
D. It is the main component of the air people breathe.
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单项选择题
A. Iris felt Beatle’s tunes were not out of date. B. Iris preferred her brother’s hip-hops song to Beatle’s tunes. C. Iris enjoyed Beatle’s tunes more than hip-hops songs. D. Iris liked to play hip-hop songs with her brother.
A. Iris felt Beatle’s tunes were not out of date.
B. Iris preferred her brother’s hip-hops song to Beatle’s tunes.
C. Iris enjoyed Beatle’s tunes more than hip-hops songs.
D. Iris liked to play hip-hop songs with her brother.
单项选择题
A. The latest computer technology. B. The organizing of an exhibition. C. The purchasing of some equipment. D. The dramatic changes in the job market.
A. The latest computer technology.
B. The organizing of an exhibition.
C. The purchasing of some equipment.
D. The dramatic changes in the job market.
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