As you wander through the streets, you see thousands of masks but you have no idea_____ the faces behind them look like.

If it　　for your help,we would be in serious trouble.

What’s wrong， Tom—I have got a________. I can’t eat anything.

You are saying that everyone should be equal, and this is ______ I disagree.

23______ is reported, a new town has been built on the ruins left by the big earthquake