根据句意及汉语提示，写出各单词的正确形式。
1. Do you feel _________（孤独的）when you are alone at home?
2. In the short play, Laura played an important ___________（角色）.
3. The fans __________(鼓掌) and screamed when the famous singer appeared on the stage.
4. Do you want me to __________（订购） a cake for you?
5. Is Chinese used ____________(广泛) in the world?