prep1-164

164.     

One automobile manufacturer has announced plans to
increase the average fuel efficiency of its sport utility vehicles by 25
percent over the next five years, amounting to roughly five miles per
gallon, and representing the first significant change in the fuel
efficiency of any class of passenger vehicle in almost two decades.

(A) amounting to roughly five miles per gallon, and
representing

(B) amounting to roughly five miles per gallon, and it
would represent

(C) an increase that would amount to roughly five miles
per gallon and it would represent

(D) an increase that would amount to roughly five miles per
gallon and would represent

(E) which is an increase amounting to roughly five miles
per gallon, representing

why A can not be right answer?

x,y, and z

x,y and z

x and y

这个我都见过

x， and y

貌似我没见过

个人看法

只有当and连接的是两个完整的句子的时候才能加逗号

我认为amounting和representing的逻辑主语应该是plan，表示Plan的一个状态。但是plan amount to five miles per gallon逻辑意思错。因此要加上increase表述更加清楚。

所以我觉得A反了一个effectiveness的错误。

我不太同意楼上的观点，现在分词放在句末作修饰只有两种情况，一是表示前面句子所引发的结果，这个是不需要逻辑主语的。另外一种就是伴随主句的动作同时发生的动作，逻辑主语是主句主语。如果是表示修饰前面词语的话，除非是插入成分，否则需要紧跟所修饰的内容，不要添加标点符号。插入成分的那种可以举个例子，我记得Perp上有一道题，中间部分是 that the elephant, giving rides to children at the Whipsnade Zoo, had been earning, 这种情况下是修饰elephant，作为插入语。

我觉得LZ看这道题还是要看后面内容跟前面主句的逻辑关系，-ing放句尾的两种情况在本句中都不符合逻辑意思，同位语表达清晰，答案选D