单选题 You ______ yesterday if you were really serious about the job.
A. ought to come B. ought come
C. ought have come D. ought to have come

【正确答案】 D

【答案解析】考查情态动词及其时态。Ought to do sth应该做某事。排除选项B和C。条件从句的时态为过去时，主句有yesterday，说明是过去发生的事情。情态动词后用完成时表示已发生的动作。选项D是正确的。