Brushing removes larger particles, but dentists suggest brushing the back of the

游客2025-05-09 10

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 congregate聚集；flourish繁荣；collaborate合作；embark着手。

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