【题目】George _________ too far. His coffee is still warm.
A.must have gone
B.might have gone
C.can't have gone
D.needn't have gone

【答案】C
【解析】考查情态动词+have done。乔治不可能走得太远了。他的咖啡仍然是温的。can't have done是对过去的否定推测；must have done过去一定做了某事；might have done过去可能做了某事；needn't have done过去本不必做某事。故选C。