托克维尔说：“一个中央政府，不管它如何精明强干，也不能明察秋毫，不能依靠自己去了解一个大国生活的一切细节。”这表明他主张（  ）

根据所给单词的首字母和汉语意思写出正确形式完成句子。

根据句意或中英文提示写出所缺单词。
1. Water covers about three quarters of the earth's ____ .(表面)
2. ____ (though) he is very clever, he doesn’t work hard at his lessons.
3. Are you ____  (sure) Mr Wang will come to our meeting?
4. ____  with life on Earth, life on Mars will be better in many ways.(比较)
5. The Great Wall is one of the ____  (unusual things that fill people with surprise) in the world.