What’s the matter ________ the kitchen fan.
---Why didn't you go to the party last night? ---Because I was waiting for Sam in his office _______ he came back.
—Hey! Peter! What are you looking at? ---I find ________ hole in the blackboard, let's go and tell Mr. Wang about it.
–Do you know _______? ---I’ve got no news. Maybe next year?
–Sorry, mom! I am late. The traffic is terrible today. --What a pity! Jenny ___ here to see you, she should be on her way home now.
–Anyone called me when I was out? --Yes. A man did and he called ___ John.