2. 外语
  3. Brushing removes larger particles, but dentists suggest brushing the back of the tongue as well, where food residues and bacteri

Brushing removes larger particles, but dentists suggest brushing the back of the tongue as well, where food residues and bacteri

admin2006-06-06  74
问题 Brushing removes larger particles, but dentists suggest brushing the back of the tongue as well, where food residues and bacteria ______.
选项 A、flourish
B、collaborate
C、embark
D、congregate
答案D
解析
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