根据所给汉语意思或首字母提示，写出单词的正确形式。
1. Even a child knows S______ is the last day of the week.
2. If everyone makes a contribution to p_______ the environment, the world will become more beautiful.
3. My sister works as a l_______ in a university library.
4. The disasters in the coal mines must be s_______ from happening again.
5. The Spiderman is an interesting film, so it's well w______ seeing.
6. We all went hiking yesterday e______ Tom.
7. I want to learn how to eat to keep me (健康).
8. English is ______ (广泛) used by all over the world.
9. Just then , Jim came ______ (跑) along with laughing and singing.
10. Now people in the world realized that they must learn to care for their ______ (生活) environment.
11. We are all excited that our country has ______ (成功) sent Shenzhou VI.
12. My brother is studying ______ (国外).