Надо сделать по .. ))exercise 2. use past simple - active or passive: 1. the remaining teeth (to extract) and the fixed partial dentures (to remove). 2. protein and vitamin levels (to exceed) the minimal recommended level. 3. calculus deposits carefully (to remove ) from the selected teeth with a hand scaler. 4. the marginal fit of each crown (to examine) on the tooth. 5. a light-cured resin (to use) to fix each tooth.

1. The remaining teeth was extracted and the fixed partial dentures were removed.
2. Protein and vitamin levels exceeded the minimal recommended level.
3. Calculus deposits were carefully  removed from the selected teeth with a hand scaler.
4. The marginal fit of each crown was examined on the tooth.
5. A light-cured resin was used to fix each tooth.