Ⅰ. 根据句意及首字母提示完成单词(10分)
1. There is a big tree b_______ the house.
2. I like chemistry very much because the teacher often e_______ with some chemicals in class.
3. Do you know the s_______ of the 30th Olympic Games?
4. You often see the sign “Don’t throw away r_______ everywhere”. It’s bad for our environment.
5. He can’t walk n_______ because of the bad leg.
