单项选择题

A. Children and teenagers.
B. City-dwellers of middle class.
C. Blue-collars in firms.
D. Brazil’s consuming class.
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American laws concerning alcohol
单项选择题
A. Because people might have to migrate there someday. B. Because it is very much like the earth. C. Because it is easier to explore than other planets. D. Because its atmosphere is different from that of the earth.
A. Because people might have to migrate there someday.
B. Because it is very much like the earth.
C. Because it is easier to explore than other planets.
D. Because its atmosphere is different from that of the earth.
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