问题
选择题
—_________ exercise do you need?
—I need about twenty minutes of exercise.[ ]
A. How many
B. How much
C. How often
D. How
答案
答案：B
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—_________ exercise do you need?
—I need about twenty minutes of exercise.[ ]
A. How many
B. How much
C. How often
D. How
答案：B