题目内容

There are usually 28        in a person’s mouth, so we should listen to the doctor’s ______ to protect（保护）them.
A．tooth, adviceB．teeth, adviceC．toothes, advices D．teethes, advices
B
本题中的牙齿为可数名词，复数为teeth，advice为不可数名词，故本题选B。
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