If _____ to look after luggage for someone else, inform the police at once.
A. askedB. to askC. askingD. having asked
A
【解析】
句意為:如果有人要你照看一下行李,立即找警察幫忙。主句inform the police at once=You can inform the police at once. 隱含了一個主語you。If 狀語從句中ask與主句主語you含著邏輯被動關系,所以用過去分詞asked.
【考點定位】非謂語動詞的考查。不定式作狀語表目的/結果/原因等。如 We all jumped with great joy to hear the news that our country would have joined WTO by the end of the year.使用現在分詞作狀語時,分詞動作的執行者必須是句子的主語。如Whistling the merry tune, Jack fixed the tire. 過去分詞作狀語,用來說明謂語動作發生的背景或情況(有時分詞動作的受施者是句子的主語。) Looked at in this way, the situation doesn’t seem so disappointing...
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