Transform the sentences according to the model using the words necessary, important, possible, impossible, difficult, traditional, hard, easy, customary. Model: You should think twice before you agree. It is important for you to think twice before you agree. 1. Students should enjoy their student life. 2. Teachers should be competent. 3. We don't have to hurry. There's plenty of time. 4. A fish can't live out of water. 5. A child usually can't sit still for a long time. 6. Students have to budget their time carefully. 7. My family always eats turkey on Christmas. 8. I usually can't understand fluent English. 9. The guests usually wait until the hostess begins to eat. 10. The bride usually feeds the groom the first piece of wedding cake. 11. Mary should start think- ing about her future. 12. Animals can't talk or think or plan something. 13. I can understand my teacher most of the time. 14. A writer should be imaginative. 15. My parents are anxious I should enter the University.