题目内容
?Can you go swimming with us this afternoon?
?Sorry, I can't. I ________ take care of my little sister at home because my mother is ill.
A. can
B. may
C. would
D. have to
答案:D
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题目内容
?Can you go swimming with us this afternoon?
?Sorry, I can't. I ________ take care of my little sister at home because my mother is ill.
A. can
B. may
C. would
D. have to