【题目】 Remember that ______ is better than cure, so brush your teeth at least twice a day and visit your dentist for regular check-ups.
A. priority B. privilege
C. principle D. prevention
在线课程【答案】D
【解析】
试题分析：考查名词。A. priority优先，优先权； B. privilege特权；C. principle原则；D. prevention预防。句意：记住，预防胜于补救，所以每天至少要刷两次牙，并且要定期做牙科检查。故选D。