新东方小蓝一问

liangruichao

Q: Most of Portugal's 250,000 university sutdents boycotted classes in a one-day strike to protest a law that requres 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

答案是D，我想问一下B究竟哪点不好了？谢谢

gmat928

B中for which的which后面引出定语从句中缺少主语，如果改为for which $7 was previously paid per year才可以考虑。

下面是几个例句供参考

Like the thorny ballooning of a frightened pufferfish or the sudden appearance of angry sapphire hoops for which the blue-ringed octopus is named, the California newt's display of its red underbelly is a clear warning that predators ignore at their peril.

As U.S. nuclear attack submarines prowl their familiar haunts deep within the oceans of the world these days, they increasingly are engaged in missins far different from the tasks for which they were built and for which their crews were trained over the last forty years. (E-P65-24)

During the recession of 1973, home mortgage foreclosures resulted in tens of thousands of Americans being evicted from homes for which they could no longer afford monthly payments.

gmat928

B中的which指代higher education，higher education怎么能被paid？
所以必须补出be paid的主语$7

liangruichao

Thank you!