[求助]大全433

433. Intended primarily to stimulate family summer travel, the new airfare, which allows both an adult and a child to fly for the price of one ticket, and also shortens the advance-purchase requirement for family travel to a minimum of seven days rather than fourteen.

(A) and also shortens the advance-purchase requirement for family travel to a minimum of seven days rather than

(B) and also lessens the advance-purchase requirement for family travel to a seven-day minimum from

(C) also shortens the advance-purchase requirement for family travel to a minimum of seven days rather than that of

(D) also lessens the advance-purchase requirement for family travel to a seven-day minimum from（E）

(E) also shortens the advance-purchase requirement for family travel to a minimum of seven days rather than

C为何不对？

433, sec21-14

A,B都没有谓语的.shortens是从句的谓语.

C有三个错误，首先that指代不清，前面有两个单数名词，requirement和minimum；其次罗索, rather than前后要有平行的内容就行, 这里fourteen清楚的表明是fourteen days, 前面的a minimum of 用that of代替显得多余, 可省；

D. from... to... 的顺序是不能改的(这个观点不敢肯定,说尽量不改比较好)。7d minimum不知道能不能这样用，即使能，也应该是from 14d minimum to 7d minimum. 这里to a seven-day minimum from fourteen省略了minimum, 这样省略依据似乎不足, 意思表达不完整。实际至少要表达的意思是from a fourteen-day minimum to a seven-day minimum.

E. best.

lessen减少[intransitive and transitive]synonym reduce

to become smaller in size, importance, or value, or make something do this
lessen the risk/chance/possibility etc (of something) Exercise lessens the risk of heart disease. lessen the impact/effect/importance (of something) The new project will lessen the effects of car pollution.Gradually her anxiety lessened.

shorten缩短[intransitive and transitive] opposite lengthen
to become shorter or make something shorter

大全里的题目解释可以下载大全注释，LZ可以研究下置顶帖的复习资料，以便提高效率。

非常感谢!

是不是,就是 a minimum of sth, a lot of sth..........  等非所有格 结构 比较时, 在 后面的 than ,rather than ....等这样的 不用 that of, those of.......  而 要是 名词 的所有格结构  A OF B 比较时 用 that 或 those  ，，后面 如: A OF B than that (those) of sth 。。。请指教。 谢谢

对的，a minimum of sth, a lot of sth都只是一种量词，并不是所有格形式。比较对象对称原则中补出的that或those一定要有明确指代对象。

向 : 斑竹 carolhide  致意. 五一 ,劳动最光荣 .谢谢 . 知道了.