小测验：选择正确的单词

1. A dentist sterilizes his instruments.
   牙科医生给他的器具消毒。
2. I offen go to a dentist in Japan.
   我常去日本看牙医。
3. A dentist inspects the pupil's teeth twice a year.
   一位牙医一年两次为那个小学生检查牙齿。
4. The dentist soon put the small girl at ease.
   牙医很快使小女孩的情绪放松了。
5. The dentist is going to yank this tooth out.
   牙医将拔掉这只牙。

　1个名词解释