AmericansNewYorkCity"TheBigApple"since1971.()A.callB.calledC.hascalledD.havecalled
Americans________ New York City"The Big Apple"since 1971.( )
A. call
B. called
C. has called
D. have called
根据时间状语从句since 1971,强调过去发生的事情一直持续到现在,包括现在在内,判断主句用现在完成时.现在完成时的构成是:主语+have/has+动词的过去分词;主语是Americans是复数形式,助动词用have,故选D.
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