问题
选择题
—I can’t keep myself active during the day.
—You _______ take more exercise.[ ]
A. must not
B. must be
C. need to
D. may be
答案
答案：C
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—I can’t keep myself active during the day.
—You _______ take more exercise.[ ]
A. must not
B. must be
C. need to
D. may be
答案：C