标题: 大全952 [打印本页] 作者: wokey 时间: 2009-11-27 21:49 标题: 大全952 952. 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 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
答案是A
我的问题是A和B项里面那个that是干什么呢 分析来看它应该是在修饰jet engine,可是它的位置实在奇怪。可以中间插着“is being tested” 这么说么？