18．Mobile phonesplayanimportantpart（起重要作用） in our daily life．

分析 手機(jī)在我們的日常生活中起重要作用．

解答 答案：play an important part
起重要作用：play an important part，常用的動詞短語；句意表達(dá)的是客觀事實，主語是復(fù)數(shù)，要用動詞原形來構(gòu)成．

點(diǎn)評 翻譯填空題考查的是詞匯記憶和句意理解能力．解題時，要用理解句意的前提下，注意詞匯的拼寫．

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