【題目】Today, computers are really helpful. They _________ everywhere.

A. use B. are used C. used D. were used

【答案】B

【解析】試題分析：根據(jù)語境可知此題考查的是一般現(xiàn)在時的被動語態(tài)的基本構(gòu)成和用法。整個文句的含義是現(xiàn)在電腦非常有用，他們被應(yīng)用到各個領(lǐng)域，主語是they，電腦，是動作的承受者，并且是習慣性的動作，故用一般現(xiàn)在時的被動語態(tài)。主語是復數(shù)故選B。

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