我的最后两个语法问题,急!明天考拉~

21. Most 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. DC

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

63. The new sports car is heavier than usual for a performance automobile, but it is exceptional because of its high-powered engine.AD

A) usual

B) it is usual

C) one usually is

D) is usual                                                           

E) has been usual

21题：

BDE显然不对，A中的paying应该改为payment较好，而且应该放在year,之后。

63题：此处省略it. 并且倒装，补全应该是：than is it usual for...,我以前隐约记得由此语法现象。我找找看，应该在TOEFL考试中有。

here:

Genetically, the chimpanzee is more similar to humans _______.

A. are than any other animal

B. than is any other animal

C. any other animal is

D. and any other animal is

答案B