单项选择题

A. Twice a week.
B. Several times.
C. In a week.
D. By a taxi.
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单项选择题
A. 6 pills. B. 5 pills. C. 4 pills. D. 8 pills.
A. 6 pills. B. 5 pills. C. 4 pills. D. 8 pills.
填空题
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