Once Johnny starts painting a picture, he won"t stop until it_____

Once Johnny starts pai

单选题 Once Johnny starts painting a picture, he won"t stop until it______.

A.had been finished

B.was finished

C.is finished

D.will be finished

正确答案： C

答案解析: 本题考查时态与语态。句意：一旦约翰尼开始画一幅画，他不画完是不会停下来的。not。until。引导时间状语从句时，从句不能用将来时，主句为一般将来时，从句用一般现在时。it指代 picture，与 finish是被动关系，故应使用被动语态。故本题选C。

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