急， 请教Prep2-133

Braveboy2008

133.      (31827-!-item-!-188;#058&006534)

 

A recently published report indicates that the salaries of teachers continue to lag far behind other college-educated professionals, because they make an average of nearly $8,000 a year less at the start of their careers and almost $24,000 less a year by the time they reach the age of 50.

 

(A) other college-educated professionals, because they make an average of nearly $8,000 a year less at the start of their careers and almost $24,000 less

(B) other college-educated professionals, by an average of nearly $8,000 a year at the start of their careers, to almost $24,000

(C) what other college-educated professionals are paid--making an average of nearly $8,000 a year less at the start of their careers and almost $24,000 less

(D) those of other college-educated professionals--by an average of nearly $8,000 a year at the start of their careers to almost $24,000 less

(E) those of other college-educated professionals--by an average of nearly $8,000 a year at the start of their careers, and by almost $24,000

答案是(e)

我的问题是 E 选项的“, and by” 到底和谁并列， 根据以前题的经验“, and" 因该与主句并列，但为什么这里跟从句的并列了， 不能因为长的像我们就并列吧？？？

我有点猪头的表现了。。。

Braveboy2008

Ding

ad264

by an average of nearly $8,000 a year at the start of their careers, and
            by almost $24,000 a year by the time they reach the age of 50.

alanfu

顶,该帖的and 前面有逗号,一般都理解是和主句并列吧?此处会不会产生歧义呢?

alohabrian

关于此题，我有3个问题。
1、
and之前为什么加comma？

明明只连接两个并列介词结构，怎么就加上逗号了呢？

难道是为了强调，句末状语的修饰 by the time they reach the age of 50是修饰第二个by结构的？

2.破折号到底如何使用？


3. 这里介词by算是什么用法？

songlovegt

同意楼上关于都号的解释
是为了强调，句末状语的修饰 by the time they reach the age of 50是修饰第二个by结构的

我觉得破折号的作用是强调，无破折号 by 引导的成分就淹没在句中了。

lag behind 经常和 by 一起连用

例子 from longmans

Sales figures are lagging behind last year's by 40 percent.

smartsky11

4

Ryang

同问题，感觉完全不应该有那个逗号；可能因为不用担心产生歧义吧，它是一个相对D较好的答案。

AlienX

同意沒有comma會更清楚, 可是句子太長, 一定有有一個地方要pause一下
而且這個comma不會造成太大的歧異, 因為by會優先和別外一個by並列

shuxuehai

我觉得破折号在这里表示解释。Lag far behind,behind 多少由破折号引出。