I/

1. the students were grade 7 have a excursion last year

2. Minh will be fourteen next month

3. Mr.Brown is teaching English now

4. She does aerobics every morning

5. She ate a lot of sweet some day ago, so she ill now

6. They are working on the farm at the moment

7. They will have a party tonight

8. She forgot do her homework yesterday

9. he often plays soccer after school

10. The dentist will fill the cavity in him tomorrow

II/

1. Filled - hurting

2. Do you need - feel

3. booking- forgo- will telephone

4. am going to buy

5. didn't want- left

6. gets up- brushes- got up- brushed- was

7. didn't eat- ate- drank

8. Did ( you ) go- went

9. were- had

10. didn't write- is phoning

11. isn't working

12. does ( it ) cost

13. Did ( you ) go out- went- didn't enjoy

14. will travel