比较的省略OG46

colorsofthewind

46. 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

Choice E, the best answer, uses the adverbial phrase more quickly than to modify the verb phrase gain weight.
I know E is correct. But it seems it omits "do"?

So what are the rules about the omitting in the comparative setences? Wondering now...

linlin315

我认为这个原则就是：在比较对象并不产生争议的情况下是可以省略do的。这里很明显是
这句话是比较these calves(什么样的calves呢？exercise and associated with other calves)和those calves（raised in confinement)得比较，没有其他的比较可能，所以是可以省略do的。

[此贴子已经被作者于2003-10-21 22:17:51编辑过]

rorarora

以下是引用linlin315在2003-10-21 22:17:00的发言：
我认为这个原则就是：在比较对象并不产生争议的情况下是可以省略do的。这里很明显是
这句话是比较these calves(什么样的calves呢？exercise and associated with other calves)和those calves（raised in confinement)得比较，没有其他的比较可能，所以是可以省略do的。

严重同意！！