Ⅰ. 根据句意及首字母提示完成单词(10分)
1. Many people know that the earth is a p_______.
2. I will see some beautiful birds if I walk through a r_______.
3. His grandfather was an o_______ member of an organization then.
4. The girl on the p_______ chair is his little sister.
5. I can’t j_______ another thing into the bag.