根据句意及首字母或汉语提示完成下列句子。
1. He has found that his family is like a tall tree with long r____
2. It's your t ____ to clean the bedroom today.
3. Guangzhou is a big city in the s ____part of China.
4. Our____(政府)has found many ways to keep people from getting H1Nl flu.
5. Many ____ (海外的)Chinese want to come back to build our country.