【題目】If ______ to look after luggage for someone else, inform the police at once.

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

【答案】A

【解析】

試題分析:考查狀語(yǔ)從句省略。當(dāng)狀語(yǔ)從句的主語(yǔ)和主句主語(yǔ)一致的時(shí)候,可以把狀語(yǔ)從句的主語(yǔ)和系動(dòng)詞一起省略。本句在if的后面省略了you are,本題主句是祈使句inform the police,其主語(yǔ)是you,只不過(guò)被省略了。句意:如果你被請(qǐng)求幫助別人照顧行李,請(qǐng)立刻報(bào)警。故A正確。

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