【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

【答案】C
【解析】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。