You should know better than ______ your little sister at home by herself.

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问题 You should know better than ______ your little sister at home by herself.

选项 A、to leave
B、leaving
C、to have left
D、left

答案A

解析此题考查固定用法。to know better than to do sth．是一个常见的表示责备的句型，意为“应该知道不该做某事”。

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专业英语四级

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