She stayed at home during the whole summer vacation ______ she could look after her old grand- mother.

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问题 She stayed at home during the whole summer vacation ______ she could look after her old grand- mother.

选项 A、in case
B、now that
C、so that
D、as though

答案C

解析 本题考查的是从属连词so that的用法。C项中的so that可以引导目的状语从句,意为“以便”。本题中的主句是“She stayed at home”.从句“...she could look after her old grandmother”是目的状语,故C项为正确答案。A项in case意为“以防”,B项now that意为“既然”D项as though意为“仿佛,好像”,此三个选项均不能引导目的状语从句,故应排除。
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