在中心地理论中，所谓“中心地”指的是( )。

A．区域的几何中心

B．泛指的城镇或居民点

C．区域内向周围地域提供货物和服务的中心城市或居民点

D．具备一定规模商业、服务业、制造业等职能的中心城市

根据下面对话中的情景， 在每个空白处填入一个适当的语句，使对话恢复完整 。

A: Alice ,  66. ______________________ when the fire started ?

B: I was studying in the library .

A: Did you smell the smoke ?

B: 67. ____________________ , but Meimei did .

A: Where was she ?

B: 68. _____________________ in the gym .

A: 69. _____________________

B: John was eating lunch in the dining room . Where were you ,Dong  ?

A: I was talking on the phone .

B: 70. _________________________

A: I called the fire department .

B: Good for you  .