Ex6:
1. matter
2. toothache
3. go
4. gave
5. take
Ex7:
1. You shouldn't to go out now.
-> ∅
2. Why don't we going and see her after school?
-> go
3. You should go to bed early because it is good at your health.
-> for
4. He usually brush his teeth twice a day.
-> brushes
5. My sister should takes a rest and drink warm water.
-> take
6. My big brother have an earache.
-> has
7. Where didn't you go to school yesterday.
-> Why
8. He can't speak loudly because he has an sore throat.
-> a
9. He is standing over there, to the corner of the classroom.
-> in
10. I have a bad headache, because I can't go to school.
-> so