英語のWh―移動について

こんにちわ。英語の混成言語の文についてご質問があります。
以下の英文には、それぞれ使い方がおかしい個所があります。その個所がどこなのか、分からないところがあります。こうではないのか？この答えはおかしい、と思うところがありましたら、是非参考にさせていただきたいので、ご指摘よろしくお願いいたします。

（１）It is interesting that how some people learn languages very quickly.

（２）Another thing that we don't have is Police inside the university, I couldn't understand which is their job.
→　最後のwhichをwhatに。

(3)People wonder how does China with a population of 800 millions could possible be ignored during the last 22 years.
→possible の主語に「人」は来ることができないので、how以降の文章は以下のようになる。
...how could it be possible for China with a population of 800 millions to be ignored... .

（４）While we are surrounded with nothing exceot atoms, it is interesting to know what is the structure of we　are　surrounded　with　nothing　exceot　atoms,　it　is　interesting　to　know　what　is　the　structure　of　an　atom.

No.1 回答者： fruchan 回答日時： 2011/09/23 10:22

（１）It is interesting that how some people learn languages very quickly.

→　... interesting that how come some people ..
or
... interesting why some people ...


（２）Another thing that we don't have is Police inside the university, I couldn't understand which is their job.
→　最後のwhichをwhatで良いと思う。

(3)People wonder how does China with a population of 800 millions could possible be ignored during the last 22 years.
→possible の主語に「人」は来ることができないので、how以降の文章は以下のようになる。
...how could it be possible for China with a population of 800 millions to be ignored... .で良いと思う。

（４）While we are surrounded with nothing exceot atoms, it is interesting to know what is the structure of we　are　surrounded　with　nothing　exceot　atoms,　it　is　interesting　to　know　what　is　the　structure　of　an　atom.

→　While we are surrounded by nothing but atoms, it is interesting to know what is the structure of we are surrounded by nothing but atoms and it is also interesting to know what is the structure of an atom.