2. 外语
  3. Brushing and flossing can surely keep your teeth and gums healthy. Regular plaque removal, along with ______, can help people r

Brushing and flossing can surely keep your teeth and gums healthy. Regular plaque removal, along with ______, can help people r

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问题 Brushing and flossing can surely keep your teeth and gums healthy.
Regular plaque removal, along with ______, can help people reverse gingivitis.
选项
答案good oral hygiene habits
解析 定位到文章中More Dental Problems标题下末句：If your remove plaque regularly and follow good oral hygiene habits，your gums usually will return to their healthy state．(如果你能定期清除牙斑，养成良好的卫生习惯，你的牙龈通常会恢复健康。)由此可得出答案。
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