---Will you read me a story, Mummy?

--- OK. You_______have one if you go to bed as soon as possible.

A．might

B．must

C．could

D．shall

为了防止炉膛和尾部烟道再次燃烧造成破坏，常在炉膛和烟道易爆处装设( )。

A．安全阀
B．超温报警装置
C．压力表
D．防爆门