Comeplete the sentence with the correct

(1) Comeplete the sentence with the correct word.
      matter  should  backache  because  dentist
1. My grandmother has a ....................................
2. Mary has to go the ............................ because she has a toothache
3. What's the .......................... with Phong?
4. You ............................................ take some medicines.
5. Linda can't go to school ................................ she has a headache.