- one and a half months enough for the project to be finished? ---I am afraid not. The

问题补充：

--- one and a half 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. Is; can he

D. Are; can he

答案：

A. Is; he can

B. Are; he can

(答案→)C. Is; can he

D. Are; can he

解析：句意：这个项目完成一个半月足够了吗？--恐怕不能。教授生病了，只有他恢复了才能继续。第一空需要be动词，主语是one and a half months表示一段时间，谓语用单数，所以排除BD，第二句话是only+时间状语从句在句首，后面用部分倒装，can放在主语前面，所以选C。