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虚拟问题请NN指教

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楼主
发表于 2013-5-21 18:42:08 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
One of Ronald Reagan’s first acts as President was to rescind President Carter’s directive that any chemical banned on medical grounds in the United States be prohibited from sale to other countries.

(A) that any chemical banned on medical grounds in the United States be prohibited from sale to other countries

(B) that any chemical be prohibited from sale to other countries that was banned on medical grounds in the United States

(C) prohibiting the sale to other countries of any chemical banned on medical grounds in the United States

(D) prohibiting that any chemical banned on medical grounds in the United States is sold to other countriesC

(E) that any chemical banned in the United States on medical grounds is prohibited from being sold to other countries

为什么要用虚拟语气呢?还有A选项有点不太明白~
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沙发
 楼主| 发表于 2013-5-21 19:28:56 | 只看该作者
A huge flying reptile that died out with the dinosaurs some 65 million years ago, the Quetzalcoatlus had a wingspan of 36 feet, believed to be the largest flying creature the world has ever seen.
(A) believed to be
(B) and that is believed to be
(C) and it is believed to have been
(D) which was, it is believed,
(E) which is believed to be
B为什么不可以?C为什么用have been 呢?
板凳
 楼主| 发表于 2013-5-26 14:07:45 | 只看该作者
懒蜗窝 发表于 2013-5-21 19:28
A huge flying reptile that died out with the dinosaurs some 65 million years ago, the Quetzalcoatlus ...

请教了老师 她说科学家喜欢这样因为可以感觉非常严谨~
地板
 楼主| 发表于 2013-6-22 19:13:58 | 只看该作者

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