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

分析 在中國和其他一些國家吃飯的時候大聲說話是不禮貌的.

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

點評 本題考查連詞的用法,特別要區(qū)分when和while引導的時間狀語從句,在應用時要熟練掌握.

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