It was _______ great fun to be a host, wasn’t?－Yes. That’s _______ experience hard to forget.

I’m sorry I _______ my English book at home.— That’s all right. Don’t forget to bring it next time.

There was an interesting article animals in yesterday’s paper.[ ]

I can’t decide______. – You mean the red one or the blue one?

Volunteering is becoming popular in China .— Yeah, people are now aware that helping others is helping themselves.