xdf 21

lll123

In the 1980’s the rate of increase of the minority population of the u.s was nearly (twice as fast as )the 1980’s
b.twice as fast as it was in
c.twice what is was in
b为什么不对

心静

B中it指代不明确。

siebel

AC也不对吧

lyricling

twicer不能修饰fast，只能修饰表数量的词，如much,many等。

joywzy

以下是引用lyricling在2003-7-10 12:50:00的发言：
twicer不能修饰fast，只能修饰表数量的词，如much,many等。

exactly.

tocean0222

“the  rate" cannot be used with "fast",which is an adjective cannot be modified by "twice". Thus,B is incorrect.