根据句意及所给中文提示或英文解释，写出句中所缺单词。

1. Children in the west usually wear  _________  (特殊的) costumes with masks at Halloween.    

2. Zhang Shaohan has a sweet  _________  (嗓音), and many of us like listening to her songs.   

3. People around the world love  _________ (和平) and hate wars.                              

4. As we know, _________  (星期一) is the second day of a week.                               

5. Sorry, I didn't follow you. Would you please speak more _________  (清楚地)?              

6. Now we are short of water and we should s_________  water in our daily life.               

7. Peter's father is very _________ (not free), so he does not have much time for his family.