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16.In China and some other countries,it is impolite to speak loudly _______ you are having a meal.(  )
A.beforeB.whileC.after

分析 在中國(guó)和其他一些國(guó)家吃飯的時(shí)候大聲說(shuō)話是不禮貌的.

解答 答案:B  本題考查連詞的用法,before,在…之前;while,當(dāng)…的時(shí)候;after,在…之后;根據(jù)關(guān)鍵詞you are having a meal.可知是時(shí)間狀語(yǔ)從句,并且是進(jìn)行時(shí)態(tài),用while引導(dǎo);故選B.

點(diǎn)評(píng) 本題考查連詞的用法,特別要區(qū)分when和while引導(dǎo)的時(shí)間狀語(yǔ)從句,在應(yīng)用時(shí)要熟練掌握.

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