◎ 题干
Mum was ill. So I _____ at home.

A. have to stay
B. had to stay
C. have stay
D. has stay
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Mum was ill. So I _____ at home.[ ]A. have to stay B. had to stay C. have stay D. has stay…”主要考查了你对  【实义动词的过去式】【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。