题目内容：
What can we learn from Serval's words in Paragraph 3 ?
A．You will find it enjoyable to see a dentist. B．You should see your dentist on a day-to-day basis.
C．You can brush with the Kolibree as if guided by a dentist.
D．You'd like a dentist to watch you brush your teeth every day.
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答案解析：