OG11-103！请教NN！！

CloverJackier

103. The development of a new jumbo rocket that isexpected to carry the United States into its nextphase of space exploration will be able to delivera heavier load of instruments into orbit than thespace shuttle and at a lower cost.
(A)The development of a new jumbo rocket that is expected to carry the United States into its next phase of space exploration will be able to deliver a heavier load of instruments into orbit than the space shuttle and at a lower cost.

(B)The development of a new jumbo rocket is expected to carry the United States into its next phase of space exploration and be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle.

(C)The new development of a jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle.

(D)A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle can
, and at a lower cost.

(E)A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle and to cost less.


这道题在D\E之间纠结了一下
答案是D
请问大家：1.A is able to do, as B can...
                   这个结构里面补出can是正确的么？还是应该用A is able to do, as B is...
              2.E答案中的cost为什么不能与deliever 并列呢？

谢谢了！

thinkingape

个人感觉如果cost和deliever并列的cost前得to应该省略，其次，be able

to cost 貌似cost无法表为有能力去。。。个人意见

yidiyuehans

e 错在  比较对象错误吧
deliver a heavier load of instruments into orbit than the space

shuttle
这里的应该吧助动词补出来吧， 要不有歧义啊

CloverJackier

那补出是用can 不是用 be么？

嗯好像是cost和be able to并列的~~

yidiyuehans

正确答案是用can， 那就用can对， 至于不出用be对不， 我就不知道了

CloverJackier

3ks so much~