—________ 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 canB．Are; he can
C．Is; can heD．Are; can he
C
C 考察主謂一致和倒裝句。句中主語(yǔ)one and a half months作為一個(gè)整體，表示時(shí)間，因此謂語(yǔ)部分使用單數(shù)形式，排除BD，only+狀語(yǔ) 放在句首，后面要使用部分倒裝的形式。故C正確。
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