If you meet trouble, you can ______ your friends ________ help.

How often do you go to a concert?－______ever. I’m not interested in concerts at all.

It is a long time ____ they separated, but it won’t be long ____ they meet again.

We arrived at the small town too late, almost at midnight. We found there was no food ________ as all the shops were closed.

Excuse me, is there book by Mo Yan?—Yes. It’s on bookshelf over there.