I.
16. It takes Bao three hours doing homework everyday
- doing -> to do
17. My brother has less days off than Quang's brother.
- less - > fewer
18. How much does it costs to send this letter to France?
- costs -> cost
19. The party will start at 7 and finishes at 9 in the evening.
- finishes -> finish
20. I like the cheapest in the three apartments.
- three -> third :V
II.
1. Students in grade 7 have 12 subjects at school.
2. They learn how to read stories and poems in Literature.
3. Because they can know more about the world.
4. They learn how to keep fit and stay healthy from the gymnast teacher.
5. Yes, they do.
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#Ame