14.Confession of violent crimes nationwide skyrocketed last year,but in some towns they remained steady or decreased.　

but in some towns such confessions

　　点评：该句错在指代不明。“they”不知是指“confession”而是指“violent crime”。 故而后半句需要说明。如果一个句子中谈到了多个名词，一定要注意代词。

　　15.Televisions themselves have become more affordable,but VCRs,DVD players,and monthly cable bills influence the total monetary price to increase greatly of home entertainment.

　　greatly increase the total price

　　点评：整齐简洁明了，同时符合习惯用法。

　　16.When the students take a trip on the intracoastal-waterway system next month,they will learn facts with which they have heretofore been unacquainted.

　　Right!

　　点评：倒装语句，其实在这种状况下无妨，具体为何我。。。不清楚。但也有多个类似题目大家可以在平时发掘，实在不行就死记。且有being在句中的选项经常是错的。

　　17. Even though California is smaller than Alaska or Texas it has a far larger population.

　　Texas,California has by far the largest population.

　　点评：首先防止Run-on。其次注意到Alaska和Texas中间是“or”，所以代词“it”的指代对象需要说明，将它直接换成 “California”。

　　18.In June,Juile was certified in CPR and aquatic rescue,and she has been working as a lifeguard ever since.

　　Right!

　　点评：这也是一种题型，死记吧。。。某人在做完某事后一直做某事：Sb has been working as…ever since…

　　19. One of the most unusual animals in the world,eggs are laid by the platypus,which is also a mammal.

　　the platypus is a mammal that also lays eggs.

　　点评：platypus是动物，不是人，不能用Who，同时将被修饰成分和修饰语放在一起。

　　20.The unique culture of Cork is primarily founded by its great musical and lyrical traditions.

　　Cork has a unique culture founded primarily on

　　点评：又体现了最好还是用顺叙这个原则。