题目内容
As a graducate in computer science, he ___ to work out the problem.
A. wouldn't have failed B. can't have failed C. mustn’t have failed D. might not have failed
B
解析:
can’t/couldn't have done表示对过去发生的事情的否定推测。
练习册系列答案
相关题目
题目内容
As a graducate in computer science, he ___ to work out the problem.
A. wouldn't have failed B. can't have failed C. mustn’t have failed D. might not have failed
B
can’t/couldn't have done表示对过去发生的事情的否定推测。