3. In many upper-class Egyptian homes, French was spoken within the family, just as it had once been among the Russian aristocracy. (A) just as it had once been among the Russian aristocracy (B) just like it once been among the Russian aristocracy (C) just as Russian aristocracy had once done (D) similar to what the Russian aristocracy had once done (E) like what had once been done by the Russian aristocracy
Key:A, A中的it难道没有修饰歧义吗?(French or family?)我选C,究竟怎么排除C?
6. 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