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

A. do
B. does
C. doing
D. did
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科目:初中英語 來源:山東省同步題 題型:單選題

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

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