[求助!]请问濤濤10-33??

請問that的前面是不是一定要名詞？

濤濤31第10套33題

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

Ans: E  .....我答案選的是A, 因為念起來沒什麼不妥, A跟E的差別僅剩", and it"取代that, 另外不選E的原因是 it could...have the capability to也不是ets鍾愛的...難道是that在being後面不對嗎？  請各位新進指教