–Excuse me, but can you tell me which road I should take to the post office?--______ of the four roads will do.

I find _____ hard to concentrate on my studies with some people having small talks around me.

___is it ____has made Peter___ he is today?

The Three Gorges will offer you a wonderful trip, ______ you’ll remember all your life.

At last the poor man had to give up. He found __________ no use begging for more.