求解一道纠结的题目

dreamstart

Last year, land values in most parts of thepinelands rose almost so fast, and in some parts even faster than what theydid outside the pinelands.

A.so fast, and in some parts even fasterthan what they did
B.so fast, and in some parts even fasterthan, those
C.as fast, and in some parts even fasterthan, those
D.as fast as, and in some parts even fasterthan, those
E.as fast as, and in some parts even fasterthan what they did


答案是D，可是E选项错在哪里呢？求解

清凉夏

E use the confusing and unparallel “what they did” instead of “those”.

dreamstart

Many thanks!能否再看一下这道题目

In the 1980’s the rate of increase of theminority population of the United States was nearly twice as fast as the 1970’s.


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


答案是C，请问为什么不是B，还有D如果改为twice faster than that of 是否也是正确表达

清凉夏

B:If the rate is twice, it is obviously fast. Hence presence of both twice and fast is redundant.
E: The rate is a speed, so we have to use greater/lesser.
"twice faster than that of "说的是三倍，改变了原句的意思。原句是说两倍。