He began to write two hours ago. He ____have finished the articl

He began to write two hours ago. He ____have finished the article now.
A、might
B、ought
C、ought to
D、had to
【正确答案】:C
【题目解析】:C ought to表推测,暗含很大的可能。其语气较may强,较must弱。其过去时与原形一样,都是 ought to.