【题目】William was late. He ____________ earlier if he was really serious about the interview.
A. may have come B. should be coming
C. ought to have come D. must have come
在线课程【答案】C
【解析】考查情态动词+完成式。句意：William迟到了。如果他真的在意这场面试的话，他本该早点来的。ought to have done=should have done＂本应该做却没有做＂。故选C。