根据句意及汉语提示填空。
1. Hainan Island is in the _ ___ (南方的) part of China.
2. She couldn’t _ ___ (接受) our invitation because she was too busy.
3. It’s difficult for him to make a _ ___ (决定) now.
4. They were discussing the problems of western _ ___ (社会).
5. —Which is the most _ ___ (传统的) festival of China?
—Spring Festival.