用所给单词的适当形式填空。
1. They are going _______ (jog) now.
2. He has put on_______ ( weigh) after he was over 40 years old.
3. After_______ (retire) , my grandfather wants to travel around the world.
4. The young_______ ( couple) decided to start their tourimmediately.
5. You are _______ ( sure) wrong. You have made a mis-take.
