题目：
—________ 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
答案：
答案：D
题目分析：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。
点评：本题难度适中。主谓一致及部分倒装是高中阶段重要的两个语法项目，需要考生牢记它们的各种情况，在正确理解语境的下，做出正确的判断。
即学即练：I received his mother’s telephone call at eleven.＿＿that he was badly hurt in an accident yesterday.
A.Then did I know B.Only then I knew
C.Only then did I know D.Only then knew I
解析：C。句意：only修饰句子的状语（副词、介词短语、状语从句）位于句首时，句子的主谓部分倒装。
