(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?

(2013·湖北，23)While intelligent people can often________the complex, a fool is more likely to complicate the simple.

Audiences were greatly ______ by the video class about weightless conditions _____ in Tianggon-1 space station. 

Those poor and needy teenagers were excited to find a shop at the corner where they could buy ________ priced bikes.                                           

As a member of one world, each of us has a role _____ to make the earth a better place.