单项选择题

Among 169 cases, the smokers （）85.79% , and the ratio between males and females is 3.7 to 1.

A. answer for
B. account for
C. take up
D. sum up

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单项选择题

Joe puts too much （）on pills from the drugstore and does not listen to his doctor.

A. appliance
B. defiance
C. reliance
D. compliance

单项选择题

Beijing’s private cars will be banned from the roads ______ for one day a week during a six-month trial period.

A. incidentally
B. occasionally
C. randomly
D. alternately

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