-IsMaryatschooltoday?-No,sheisathome________sheisill.(生病)A.ifB.thoughC.

发布时间：2020-08-07 04:00:18

-Is Mary at school today?-No, she is at home ________ she is ill.(生病)A.ifB.thoughC.untilD.because

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D解析没上学呆在家里的原因．
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