单项选择题

She stayed at home during the whole summer vacation（）she could look after her old grandmother.

A. in case
B. now that
C. so that
D. as though

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单项选择题
He（）the train if he hadn't been stuck in traffic jam on the way to the railway station.

A. couldn't miss
B. wouldn't have missed
C. mustn't have missed
D. shouldn't miss
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