Write the correct form of each verb in brackets.
1. If Mai (not want) _______ to gain weight, she shouldn't eat much fast food.
2. If you stay up too late tonight, you might (feel) _______ tired tomorrow morning.
3. You should (sleep) _______ eight hours a night if you want to be awake and fully alert.
4. If Tom (complete) _______ his assignment on Friday, he can go out with his friends at the weekend.
5. You must (be) _______ careful if you don't want to get burnt.