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My mother is ill. I _______ stay at home to take care of her.
A.canB.mayC.have toD.Maybe
答案:C
试题分析:A. Can能;B. May可以;C. have to不得不;D. Maybe也许;句意:我母亲生病了,我不得不呆在家照顾她。结合句意,故选C
考点:考查情态动词辨析