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Had the government limited the sales of ...

Had the government limited the sales of cars much earlier, traffic jam and pollution _______so serious now.

A. has not been      B. would not be

C .had not been       D. wouldn't have been

 

B 【解析】 试题分析:考查错综时间虚拟语气。在虚拟条件句中,常省略if,把had, were, should等提到句首,构成倒装,if从句用的是过去完成时,说明是对过去的事情进行虚拟,这时,主句使用would have done。但是需要注意的是,句尾有now这个词,即主句是对现在进行虚拟的,应该使用would/should/could+动词原形,故选B。 考点:考查错综时间虚拟语气  
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