标题: GWD11-Q13 [打印本页] 作者: rainbowmanutd 时间: 2010-5-6 12:08 标题: GWD11-Q13 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
选A，没有什么疑问~我想问一下E选项 逗号and it could 是不是错的？是不是应该把it省略吧，因为主语也是前面的喷气引擎作者: pennyconan 时间: 2010-5-6 13:39
恩 it 的确应该省，当然还有更重要的问题，capability of doing 才是正确的表达方法