—Did you visit the famous cultural relics last month?—No we it but we spent too much time

问题补充：

—Did you visit the famous cultural relics last month?

—No,we it,but we spent too much time shopping.

A. could have visited

B. must have visited 

C. can’t have visited

D. shouldn’t have visited 

答案：

(答案→)A. could have visited

B. must have visited 

C. can’t have visited

D. shouldn’t have visited 

解析：此题考查了虚拟语气。从问句我们可以看出:你上月参观了那个著名的文化古迹吗？而在答句中:我们花了大量的时间买东西。所以空格处表示与过去事实相反的一个假设。故正确答案为A。must have done表示“对过去某事肯定性的推测”；can’t have done表示“对过去某事否定性的推测”；shouldn’t have done的意思为“本不该做某事而事实上却做了某事”。它们均与句子后面的意思不符。