牙周脓肿的治疗原则不包括
A．脓肿切开、引流
B．止痛、抗感染
C．调牙合
D．选择性牙周手术
E．牙髓治疗
参考答案：E
What _____________ they look like? [ ]
A. do
B. does
C. are
— ________________
— My birthday is October twenty-second.[ ]
A. How old are you?
B. When is your birthday?
