It is _____ my father worked _____ I work now.

I find _____ hard to concentrate on my studies withsome people having small talks around me

There are many other examples _______ thedevelopment of Chinese writing

Recently Peter________to do his homework, and instead insists on wasting his time playing com-puter games, which extremely annoys his father

Why not ask Tony to go to the cinema together with us —He _____Shanghai on business , and ____back in two weeks .