问题
选择题
—Could you play football with me this afternoon? .
—I'm sorry. I babysit my sister. [ ]
A. have to
B. should
C. can
D. may
答案
答案：A
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—Could you play football with me this afternoon? .
—I'm sorry. I babysit my sister. [ ]
A. have to
B. should
C. can
D. may
答案：A