____ for the terrible coal mine accident, as the public thought, the mayor of the city felt nervous and

was at a loss what to do.[ ]

A. Having blamed

B. He was to blame

C. Being to be blamed

D. Being to blame

票中票通常是为纪念（）的重大事件而发行的。

A、社会活动

B、邮政

C、邮票

D、集邮活动