一道GWDSC

wy215

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
哪位大牛来指点江山一下来？为什么是E而不是A啊？

sayysong

E的could和have the capability语义重复。

wy215

所以我选了A.但是答案说是E

sunsetchen

that 指代有歧义，到底是jet engine,还是前面整个句子

conia

选A吧，E没有A好