選B.
Tom是第三人稱單數(shù),所以選擇has to（不得不）.此句句意：Tom不得不照顧他的媽媽,（因為）她的媽媽（這幾天）病了.
Tom__look after his mother.She has been ill these days A.have to B.has to C.had to D.will have to
Tom__look after his mother.She has been ill these days A.have to B.has to C.had to D.will have to
英語人氣：500 ℃時間：2019-08-20 16:14:39
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