---,Mary had to stay at home to look after her.

学习时间:2026-06-04 06:42:49 阅读：3776

___,Mary had to stay at home to look after her.A.Her mother was ill B.Her mother being ill 注：要具体解析

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2026-06-04 06:42:49

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B
A是一个完成的句子后面的成分也是两个完整的句子之间要用连词联起来如果mary前面加个and就可以选A
B是一个独立结构用了非谓语动词being,所以无需用连词