Many tall buildings in Shengsi in the past few years.A. has been builtB. have been builtC

问题补充：

Many tall buildings in Shengsi in the past few years.

A. has been built

B. have been built

C. were built

D. have built

答案：

A. has been built

(答案→)B. have been built

C. were built

D. have built

解析：本题的主语为复数，意思为许多高楼大厦，故不选A，本题大楼被建造表示的是被动的意思，故不选D，本题表示的是从过去到现在事情被完成，故本题使用完成时的被动语态，故本题选B。