这道题a不比e好么

karma3001

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
  Answer:

karma3001

that确实是可以短暂跳跃指代的啊.
e中的capability 应该搭配of吧..

nonentity

确实选A。可以用capability of doing，也可以用capablity to do.不过和could重复了。。

karma3001

恩 e中的could都漏看了! 不然也不会还犹豫了  真发现GWD上的答案不靠普啊..