It was required that the tall building at present because it is still new. A. not pulled

问题补充：

It was required that the tall building at present because it is still new.

A. not pulled down

B. was not pulled down

C. not being pulled down

D. not be pulled down

答案：

A. not pulled down

B. was not pulled down

C. not being pulled down

(答案→)D. not be pulled down

解析：考查虚拟语气。require要求，跟从句，从句用should + 动词原形，should可省略，选D。