E. Christina braced herself and tried to keep her cool while Dr. Culpepper prepared to fill a cavity. “All I have to do is sittight and keep myself together. Now is not the time to freak out,” she told herself.
    Christina was usually as calm as a cucumber, but there’s something about being trapped in a dentist’s chair while adentist inserts tools into your mouth that puts even the bravest soul on edge. What if the dentist accidentally slips with thedrill?
     “I hear you’re on the swim team this year, Christina. Congratulations!” said Dr. Culpepper. Christina couldn’t possiblyanswer. She wondered why dentists even try to talk to their patients while they work on them. It’s impossible to talk withyour mouth full of cotton, tools, and fingers. “Almost done, Christina,” Dr. Culpepper reassured her. In the blink of an eye,Christina had her mouth back to herself. No more drilling or poking with metal instruments. Her mouth felt like a thick sockand her lips were numb. She was eager to go home. This was one day she would be glad to put behind her.
33. What is the main idea of this article?
(A) Novocain doesn’t always last long enough.
(B) Dentists love to torture their patients.
(C) Christina’s dentist filled a cavity for her.
(D) Christina hopes to become a dentist.