GWD 10-33

nolanchen

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: E

我觉得E选项的capability to do不对，应该用capability of doing sth.,记得上XDF课程时讲过ability才搭配to do. 不知其他人有无同感?

panxiaoella

极赞同。深觉选A。

大家都来讨论下嘛！

cooperyeah

我觉得and用以连接两个不同时间的状态，

ivysopher

我觉得如果选A的话就变成 test propel aircraft,句意显然不对了