Look and write（根据图意完成句子，每线一词）
1. I need go to see a dentist. I have a __________.
2. --- What’s wrong with you? --- I have a __________.
3. Don’t eat too many __________. They are bad for your teeth.
4. You should _________ your teeth twice a day.
5. You have a __________. Please take some medicine.
6. Look at the boy. He has a bad __________.
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