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Now computers _________ all over the world .
A．is usedB．are usingC． are usedD．have use
C

試題分析：根據(jù)題干，本句的意思是：現(xiàn)在電腦在全世界被應用。電腦應該是被應用，故用被動語態(tài)。而被動語態(tài)的結構是be+過去分詞。排除BD。Computers是復數(shù)，故用are。所以本題選C。
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