问题
选择题
—How often do you play a ball game at school?
— . [ ]
A. All day
B. One hour
C. Once a day
D. Half' an hour
答案
答案：C
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—How often do you play a ball game at school?
— . [ ]
A. All day
B. One hour
C. Once a day
D. Half' an hour
答案：C