— He hasn’t finished the work yet.— Well he .A. oughtB. ought toC. ought to haveD. ought

问题补充：

— He hasn’t finished the work yet.

— Well, he .

A. ought

B. ought to

C. ought to have

D. ought to have finished

答案：

@@A. ought@@B. ought to@@(答案)C. ought to have@@D. ought to have finished

解析：to后不定式的动词be，have或have been通常不省略。