重大危险源的安全监督管理工作主要由()一级安全生产监督管理部门进行。

A．国务院

B．省市

C．市区

D．区县

I’m definitely going to settle in the countryside when I retire. All the words have a similar meaning with the underlined word, Except ______.

A．surely

B．actually

C．certainly

D．absolutely