问题
选择题
Some buildings built in the past _______ down and new ones are being built there.
A．will be pulled
B．had been pulled
C．have been pulled
D．are pulling
答案
答案：C
考查时态。句意：在过去一些建筑物已经被拆毁了，在那新的建筑物正在被建起。根据语境动作时从过去一直持续到现在，所以用现在完成时态。故选C。