求助语法一题

jxttsweet

After decreasing steadily in the mid-1990's, the percentage of students in the United States finishing high school or having earned equivalency diplomas increased in the last three years of the decade, up to 86.5 percent in 2000 from 85.9 percent in 1999 and 84.8 percent in 1998.
(A)    finishing high school or having earned equivalency diplomas increased in the last three years of
the decade, up to 86.5 percent in 2000 from 85.9 percent in 1999 and
(B)    finishing high school or earning equivalency diplomas, increasing in the last three years of the
decade, rising to 86.5 percent in 2000 from 85.9 percent in 1999 and from
(C)    having finished high school or earning an equivalency diploma increased in the last three years
of the decade, and rose to 86.5 percent in 2000 from 85.9 percent in 1999 and from
(D)    who either finished high school or they earned an equivalency diploma, increasing in the last
three years of the decade, rose to 86.5 percent in 2000 from 85.9 percent in 1999 and
(E)    who finished high school or earned equivalency diplomas increased in the last three years of the
decade, to 86.5 percent in 2000 from 85.9 percent in 1999 and
答案是E

702017206

我是这么理解的   在表示复杂时态的时候要用定语从句  而不用ing的定语形势  若整句为一般现在时则用ing比较简洁  
A中 having earned  不能做定语修饰students
B中没有谓语
c跟A的类似
D中either or 不平行  且 form to  中的to前面不加up

nanxiangzi2005

感谢分享！