| 1 | I brush my teeth twice a day. | |
| 2 | Forgetting to brush teeth can easily lead to bad breath and dental caries. | |
| 3 | Dentists can easily determine if you brush your teeth well. | |
| 4 | It's necessary to brush teeth every morning and night to keep oral hygiene. | |
| 5 | Be sure to rinse your mouth after brushing, otherwise your teeth will turn yellow easily. |
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