—You didn’t invite Mary to the ball?

—____ her, too?

A．Must I invite

B．Should I have invited

C．Must I have invited

D．Should I invite

工程师认为有必要暂停施工时，应当以书面形式要求承包人暂停施工，并在提出要求后( )小时内提出书面处理意见。

A．24

B．36

C．48

D．72