UR-
Exercise 1. Use modal verbs or their equivalents.
1. The deciduous teeth ... appear at about six months after birth.
2. Teeth ... be kept clean to avoid the development of dental plaque.
3. If a decayed tooth is not treated in time pulpitis ... develop.
4. Although the dentist ... treat dental decay you ... give your teeth the
daily care they need.
5. No dentist ... to stop a tooth if it is too bad. In this case he ... extract it.
6. When a cavity is present in a tooth, the dentist will determine what ...
be done to repair the damage.
7. Adults ... thoroughly brush their teeth at least once a day.
8. Poor mouth hygiene ... lead to infection and the development of tooth
decay.
9. The initial lesion of dental caries ... develop in the occlusal fissures.
10. In case of caries a dentist ... first gain access to it.
11. Caries removal ... start in the area of cavitation.
12. Caries lesions ... occur both on pits and fissures and smooth surfaces.
13. Sometimes even a dentist ... help if disease is neglected.
14. The resistance of enamel to dental caries ... be increased by application
of fluoride to the tooth surface.
15. Fluoridation of water ... make teeth more resistant to caries.​