—— He hasn’t gone to the office up to now.
—— Well, he ＿＿＿＿＿.
A. should
B. ought to
C. ought to go
D. ought to have
网友回答
A. should
B. ought to
C. ought to go
(答案→)D. ought to have
解析：如果不定式本身为完成时态，简略答语中常保留have。ought to have＝ought to have gone to the office.