Qingdao is _____ most beautiful coastal city and I think I’ll go there for _____ second time.

A．a; a

B．the; a

C．the; the

D．the; a

家族史是

A．对于某些与遗传因素有关的口腔疾病，应仔细询问

B．尚需对患者家庭成员有关类似疾病作相应调查

C．能为诊断和治疗提供必要参考

D．是病史中的重要部分

E．以上都正确