考研英语是一门需要长时间积累的学科，对于备战2015考研的学子们来说，在此阶段，同学们应该主攻单词和语法，坚持每天1-2篇的英语阅读以此来培养语感。

　　Were the bills introduced in Congress by Democrats proposing raising the 20% threshold to 50% to pass，this latest deal would be blocked, as Covidien investors will own just 30% of the new entity.

　　解析：这个句子用了虚拟语气，结构是：If the bills were to pass, this deal would be blocked.

　　参考译文：民主党在国会中提议将并购的比例门槛从20%提高到50%，(the bills introduced in Congress by Democrats proposing raising the 20% threshold to 50%)，如果这些议案通过了，那么这次交易就可能无法通过了(this latest deal would be blocked)，因为被收购的Covidien只站到新公司的30%。

　　补充知识点：美国的税务部门叫 IRS =Internal Revenue Service (美国)国内税务局