Be careful! There’s some broken glass on the ground．The underlined part means“_____”

A．Look out         B．Go ahead         C．Get ready             D．Keep quiet

--Be more careful when you _________ the bus, or a bike may hit you.

--OK, I will.

A. get up            B. get ready               C. get on            D. get off

I’ll be ready _____________a minute.

I’ll be ready _____________a minute.

A．on                                   B．at

C．for                                  D．in