Q33: 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 这道题问了一个很N很N的人说选E,他说A的that 后面的东西不能修饰句子的主语,不知道大家有什么看法?开始我也选A
== 首先,很显然不能用定语从句that ...。排除 A/B == C中eventually able to ... is a fragment
== E正确。it 指代清晰,to propel ... or (to) help boost ...形成并列都是作the capability的补语。
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