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    精英家教网 > 高中英语 > 题目详情

    . If _____ to look after luggage for someone else, inform the police at once.

    A．asked B．to ask C．asking D．having asked

    A

    解析试题分析：句意为：如果有人要你替他看管行李，立即联系警察。ask 的主动形式后不能直接跟不定式作宾语，只能跟不定式作宾补，所以可以直接排除 B、C、D 三项。完整的句子应该是If you are asked to look after luggage for someone else,当从句中的主语和主句的主语一致的时候，可以省略从句的主语和be动词，选A。
    考点：考查状语从句的省略

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