请教GWD-9-Q23

selina_0805

After more than four decades of research and development, a new type of jet engine is being tested that could eventually propel aircraft anywhere in the world within two hours or help boost cargoes into space at significantly lower costs than current methods permit.

A.         tested that could eventually propel aircraft anywhere in the world within two hours or help

B.         tested that could eventually have the capability of propelling aircraft anywhere in the world within two hours or to help

C.         tested, eventually able to propel aircraft anywhere in the world within two hours, or helping

D.        tested, and it eventually could propel aircraft anywhere in the world within two hours or helping

      E.    tested, and it could eventually have the capability to propel aircraft anywhere in the world within two hours or help

多谢大虾指点……

[此贴子已经被作者于2008-7-21 10:12:38编辑过]

selina_0805

帮帮忙吧，没搜到以前讨论过啊……

selina_0805

快沉没了……

AlienX

D: 錯, 因為helping沒有parallel的對象
A中的could eventually propel比D and E中的could have the capability concise
A會比C parallel
是A嗎?

selina_0805

好厉害啊，是A没错，可是我不知道 tested that could 都做什么成分啊，总觉得别扭……

感谢牛牛的回答~

jesuisdesole

路过帮顶，这个 that 在这里是什么意思呢？

定语从句吗，如果修饰a new type of jet engine 是不是远了点哦

AlienX

umm...如果要重排
a new type of jet engine [that could eventually propel aircraft anywhere in the world within two hours or help boost cargoes into space at significantly lower costs than current methods permit] is being tested

is being tested會隔太遠...

A中的'that....'的位置會比較好....

AlienX

'that...'是定語從句

nemo11

以下是引用AlienX在2008-7-23 2:06:00的发言：
umm...如果要重排
a new type of jet engine [that could eventually propel aircraft anywhere in the world within two hours or help boost cargoes into space at significantly lower costs than current methods permit] is being tested

is being tested會隔太遠...

A中的'that....'的位置會比較好....

同意~

reallingling

E for me. and also I think gwd gives the answer of e in his gmat training class.

A sounds like that the "engine testing" could eventually propel aircraft.....