It was so dark outside that the little child ________ go out by himself.

The film brought the hours back to me ______ I was taken good care of in that far-away village.

k you should complain—_________ , of course, you are happy with the way things are.

President Hu Jintao urged every effort _____ to rescue and treat the injured when the earthquake happened in Sichuan in 2008．

I don’t like watching documentaries because they are boring. — _______ .