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。。。
Ding
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?
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.
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。
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