— two months enough for the project to be finished?
—I am afraid not. The professor is ill and only after he recovers go on with it.
A. Is; he can
B. Are; he can
C. Are; can he
D. Is; can he
网友回答
A. Is; he can
B. Are; he can
C. Are; can he
(答案→)D. Is; can he
解析：句意：--两个月的时间足够完成计划了吗？--恐怕不能，教授病了，只有在他康复之后才能进行。two months表示时间的词作主语谓语动词用单数；在and后的分句中only+状语放在句首应该用部分倒装，故选D。