根据下列句子及所给汉语注释，写出空缺处各单词的正确形式。

每空只写一词。

1．Swimming is one of my               (业余爱好).

2．Our teacher often              (鼓励) us to speak English.

3．You can find the library              (容易地).

4．The three space              (英雄) returned to Beijing on September 29th.

5．British students have              (少) weeks off in the summertime than Chinese students.

6．Don't you know the importance of              (保护) the environment?

7．Jack's              (自然的) hair color is brown.

8．You can park your car              (在……外面) my house.