If Joe knew anything about car mechanics, I’m sure he would help us fix the car, but he even less than we do.
A. had known
B. would know
C. knew
D. knows
网友回答
A. had known
B. would know
C. knew
(答案→)D. knows
解析：考查时态。本题的关键在于对前半句虚拟语气的理解。句意：如果Joe了解汽车方面的知识，我确信他会帮助我修理汽车。但是他懂的比我们还少。根据If Joe knew anything about car mechanics, I’m sure he would help us fix the car。这个虚拟语气中的条件句中使用knew以及主句中使用would help说明是对现在事实的虚拟，故but后面使用一般现在时。故D正确。