(2013·临淄期末联考) It's too late. Go to bed right away.Forget you need to get up as early as you can ________ the early train?

A．catch　

B．catching

C．caught

D．to catch

敦煌石窟是世界上现存规模最大的佛教艺术宝库，已列入《世界遗产名录》，尤以唐代壁画艺术著称于世。