关于比较句的一个例题

寂寞的自由

5. In the 1980's the rate of increase of the minority population of the United States was nearly twice as fast as the 1970's. B---》C
(A) twice as fast as
(B) twice as fast as it was in
(C) twice what it was in
(D) two times faster than that of
(E) two times greater than自由的疑问：B错在哪里呢？谢谢

寂寞的自由

5. In the 1980's the rate of increase of the minority population of the United States was nearly twice as fast as the 1970's. B---》C
(A) twice as fast as
(B) twice as fast as it was in
(C) twice what it was in
(D) two times faster than that of
(E) two times greater than自由的疑问：B错在哪里呢？谢谢

shellyaaa

A,B,D,E都错在rate只能用high/low来修饰，其他adj.都不行。

turtlechen

A: the rate was twice as fast as the 1970's.                      rate: 1970
B: the rate was twice as fast as it was the 1970's.             rate: clause
(C)  the rate was twice what it was in the 1970's.              rate: what(=rate that in 1970)
(D)  the rate was two times faster than that of the 1970's. rate: rate of 1970 (fast)
(E)  the rate was two times greater than the 1970's.          rate: 1970 (greater)

halcyon

fast 副词

shellyaaa

fast副词？？？

ecsniffer

fast可做adj.也可做adv.