II. Complete the following sentences. Use affirmative or negative of "must".
1. You __________________________ study harder to get better marks.
2. The boy is only twelve years old. He ___________________________ ride a motorbike.
3. Jimmy, you __________________________ bite nails.
4. My classmate is very ill. She __________________________ see a doctor as soon as possible.
5. Your hands are dirty. You __________________________ wash them before meal.
6. We __________________________ brush our teeth at least once a day.
7. Children __________________________ play with dangerous objects like knives and matches.
8. Students __________________________ use mobile phones during the test.
9. Babies ___________________________ go to bed early.
10. You ____________________________ be impolite to elderly people.
Loga
Sinh Học lớp 12
