Kids talk frequently about what they can do, __________ many adults do the opposite, tending to talk about what they can’t and why.

A．and

B．so

C．while

D．however

我国安全生产的方针是( )。

A．安全第一，预防为主

B．以人为本，预防为主

C．安全第一，以人为本

D．以人为本，安全第一