When did the computer crash?—This morning，while I ________ the reading materials downloaded from some websites.(2012·福建)

People have heard what the President has said; they are waiting to see ________ he will do.

My uncle works as a(n) _____ in Beijing. His main job is to help visitors from other countries.

I just have _____ cup of milk for _______breakfast.

It is said that both of the thieves ________ ten yeas ________