[求助] 毫无头绪的一道gwd语法题

tomchengs

GWD-29-Q29Most of Portugal’s 250,000 university students boycotted classes in a one-day strike to protest a law that requires them to contribute $330 a year toward the cost of higher education, previously paying $7 per year.
A.        year toward the cost of higher education, previously paying $7 per year
B.        year toward the cost of higher education, for which was previously paid $7 per year
C.        year, compared to the previously $7 per year, toward the cost of higher education
D.        year toward the cost of higher education, instead of the $7 per year required previously
E.        year as opposed to the $7 per year required previously for the cost of higher education



这道题目答案是D，我选的是B。但其实除了C以外（previously是副词，不能修饰$7），我都不知道其他答案哪里有错。请哪位好心的NN赐教！

bebeitts

那你觉得pay这个动词的宾语是什么？

pay （money） for sth.

$7 per year was previously paid for the high education.

...high education, for which $7 per year was previously paid.

tomchengs

B:for which was previously paid $7 per year.  which不就是主语吗？还原回来就是：the cost of education was previously paid $7 per year for.请问哪里不对呀？

linglingdan

B的错误主要是
...for which was previously paid $7 per year这里没有主语
改成for which  $7 was previously paid per year或许就好了

kzang90

A. previously paying 无对应的主语

B. which 指代不清，既可以是cost， 也可以是higher education

C. 副词修饰了名词

D.  无错

E. 搭配变成 contribute xx for the cost， 搭配不正确

请各位指正。