He had been practicing his spoken English with the ____ of working as a volunteer for World Expo Shanghai and his dream finally came true.

A．effort

B．exception

C．intention

D．contribution

依照《危险化学品安全管理条例》的有关规定，由( )负责危险化学品的公共安全管理。

A．质控部门

B．环保部门

C．经济贸易部门

D．公安部门