比较句恳请求解OG46 与总结矛盾？！

32.A study commissioned by the Department of Agriculture showed that if calves exercise and associated with other calves, they will require less medication and gain weight quicker than do those raised in confinement.

(A) associated with other calves, they will require less medication and gain weight quicker than do

(B) associated with other calves, they require less medication and gain weight quicker than

(C) associate with other calves, they required less medication and will gain weight quicker than do

(D) associate with other calves, they have required less medication and will gain weight more quickly than do

(E) associate with other calves, they require less medication and gain weight more quickly than

the key:E

根据版主推荐的http://forum.chasedream.com/dispbbs.asp?boardid=23&id=103101中总结：

对主谓宾全的句型主语比较： A do sth than B do.（AB为对等名词，加do是为了显示这是一个可以发出动作的名词，因而确定是主语，进而确定是主语对比） 介宾比较 A do sth of C1 by D1 than of C2 by D2.（C1C2，D1D2对等名词） 宾语比较 A do C1 than C2.(C1C2为对等名词） 状语比较A do sth than usual/everbefore/people expected(直接加状语）

这道题是主语同主语比较，同时有宾语，那为什么没有像大人总结的那样加上助动词呢？

最近在纠结比较句中，请大人们帮忙解答，多谢！！！

这道我也错了，说说我的看法。

在gmat中一般来说一个代词只指代一个名词，在本题中they指导calves，也就是说，在下文中一般也会用they指代，但是本体中用了those，其指代的是weight 这样的宾语，正好是最后一种形式，即：宾语比较 A do C1 than C2.(C1C2为对等名词）

gwd3-30

30.Today’s
technology allows manufacturers to make small cars more fuel-efficient now
than at any time in their production history.

A.      
small cars more fuel-efficient now than at any time in
their

B.      
small cars that are more fuel-efficient than they were at
any time in their

C.       small
cars that are more fuel-efficient than those at any other time in  those补出,省略were

D.     
more fuel-efficient small cars than those at any other
time in their

E.      
more fuel-efficient small cars now than at any time in

GWD1-16

Q16:

Soaring television
costs accounted for more than half the spending in the presidential campaign of
1992, a greater proportion than it was in any previous election.

A.      
a greater proportion than it was

B.       a
greater proportion than  than之后省略 it was

C.      
a greater proportion than they have been

D.     
which is greater than was so

E.      
which is greater than it has been

251. The gyrfalcon, an Arctic bird of
prey, has survived a close brush with extinction; its numbers are now five
times greater than when the use of DDT was sharply restricted in the early
1970’s.

(A) extinction; its numbers are now five times greater than
           than之后 省略those
were

(B)
extinction; its numbers are now five times more than

(C)
extinction, their numbers now fivefold what they were

(D)
extinction, now with fivefold the numbers they had

(E) extinction, now with numbers five
times greater than

OG11TH 198

Although Napoleon’s army entered Russia
with far more supplies than they had in their
previous campaigns, it had provisions for only twenty-four days.

(A) they had in their previous
campaigns

(B) their previous campaigns had had

(C) they had for any previous campaign

(D)
in their previous campaigns

(E) for any previous campaign
        省略 those had been

上面这些都是than结构之后的省略和补出情况，我个人的总结是。