____ I got to the reading-room, I found that he ____ there.

___ anybody call when I am away, please write down his name and address.

Mencius believed that the reason        man is different from animals is
      man is good.

This is a process          happens when land becomes desert        people cut down trees and dig up grass.

The director thought I was referring to her,      in fact, I was referring to the men on duty.

Could it be in the restaurant       you had dinner with me yesterday       you left behind your wallet?

．When he goes out, he often wears sunglasses _______nobody can recognize him．

_______ travelling expenses rising a lot, we had to change all our plans for the tour．

I was about to get on the bus ____someone called me from behind.

We won’t give up __________ we should fail 10 times.