问题
选择题
—________ 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
答案：C
C 考察主谓一致和倒装句。句中主语one and a half months作为一个整体，表示时间，因此谓语部分使用单数形式，排除BD，only+状语 放在句首，后面要使用部分倒装的形式。故C正确。