1.The design of the us dollars has last for 65 years,(which make it easy and frequently forge of all currency).

 1）which make ...2)which made ...3)making it the most easily and frequently...4)making it more ...5)making them...

 [同意]选3) making it the most easily and frequently forged of all currency省略currency after forged.请大家讨论.

 2.Overwhelmed by the Maya the ..culture,(historian ...

 1)historian...2)historian...3)the legacy...4)the more ancient culture is ...5)忘了题目不是很清楚, 请大家补充

 3. 第一道题就是语法，是考can 与could.记得是说用飞行器探测某星球的地质环境，the result can't be certain except that the aerocraft can take back something.(大意是这样的，这个是我的答案）

有选项是
 1) couldn't be certain except that the aerocraft can take backsomething.
 2) can't be certain except that the aerocraft could take back something.
 3) couldn't be certain except that the aerocraft could take backsomething.

 Comments of spring\\"我认为你的选择是对的。因为句子是陈述一件事情，所以前后的 can 时态一致. 题中并没有其他状语从句暗示the aerocraft 不能带回something，而需要用虚拟语气。(Personal view.)\\"\\"关于语法，平行（广义）与主谓一致绝对是重点。题目难度与OG持平，大家一定要把OG吃透。我一共看了4遍OG，总结了三遍。前三遍对题率基本没提高，一直80%左右。这个月复习只在考前一周看了一遍OG（之前听了白勇的讲课录音，但主要是自己总结），50题错1-2个，我知道自己提高了。其实有时候你只要能再坚持一点，就会成功，但很多人却在此时放弃了。想考高分的话，一定要重视语法。我前20题三篇阅读，2个逻辑，其他都是语法。另向想得高分的推荐笨蛋叮当的centence correction(advance),打印下来，每天读读，很有提高。这次考试的第一题就是关于SAY的用法，因为我读过相关的句子，所以轻松答出。所谓语言，其实就是一种习惯，在备考的最后阶段，应放弃语法条文，就把正确的答案当作正常的习惯的用法\\"