Tom had made up his mind to give it up, but on ____ second thought he determined to have ____ third try.

A．a ; a

B．不填 ; a

C．不填; 不填

D．the ; a

商业健康保险的毛保险费的构成部分中不包括（ ）。

A．恰好能够补偿被保险人预期损失的简单纯保费

B．用于应付不时之需的安全附加费

C．为防范公司经营风险提取的风险保费

D．由保险公司的经营管理费用形成的附加保费