At the World Literacy Center, an organization that works to help people read, the helpers work hard, enabling them to successfully reach their goals.

A．assistants

B．volunteers

C．part-timers

D．amateurs

公安消防部队大队大队部、中队党支部，党员（）应向党支部或党小组汇报一次思想和工作情况。

A.每月

B.每两个月

C.每半年

D.每年