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—How often _____ she exercise?  
—Three times a week.   

A. do
B. does
C. doing
D. did
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科目:初中英语 来源:山东省同步题 题型:单选题

—How often _____ she exercise?  
—Three times a week.   
[     ]
A. do
B. does
C. doing
D. did

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