If_______to look after luggage for someone else, inform the police at once.

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问题 If_______to look after luggage for someone else, inform the police at once.

选项 A、asked
B、to ask
C、asking
D、having asked

答案A

解析 考查非谓语动词。句意:如果你被请求为其他人照看行李,请立刻告诉警察。if引导的条件状语中省略了you are。完整的句式是:If you are asked to look after luggage,故选A项。
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