问题补充：
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 rebuilt
B. has been built and rebuilt
C. have been built and rebuilt
D. are being built and rebuilt
答案：
A. had been built and rebuilt
B. has been built and rebuilt
(答案→)C. have been built and rebuilt
D. are being built and rebuilt
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。
