In recent years, great changes have taken place in the city of Wenzhou. As we can see, many streets and roads_______.A.had been built and rebuiltB.has been built and rebuiltC.have been built and rebuiltD.are being built and rebuilt
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C解析本题考查动词时态和主谓一致。结合前面的时间状语In recent years可只要用现在完成时；many streets and roads作主语，谓语动词要用复数形式。