\(\left(-9\right)+9=0\)

1. shouldn't

2. shouldn't

3. should

4. shouldn't

5. should

6. should/ shouldn't

7. shouldn't/ should

8. should/ shouldn't

9. shouldn't

10. should

11. should

12. shouldn't

1. Linh drank coffee yesterday.

2. They did a lot of homework last week

3. My mom went to the market yesterday 

Quan hệ từ "Vì"

6. goes

7. work 

8. aren't

9. goes

10. goes