| Strong and healthy teeth can help us speak__________. |
| We should brush our teeth at least__________ a day. |
| We should get__________ toothbrushes a year. |
| Eating too much sugar isn't__________ for our teeth. |
| It is the right time to brush our teeth except(除了)__________. |
| How long should we change(更换)the old toothbrush to the new one according to this passage(按照本文)? |
| These are good eating habits except(除了)__________. |
| The best suitable(最合适的)name for Passage Three can be__________. |