________ at the door before you enter my room, please.
| A．Knock | B．Knocking | C．Knocked | D．To knock |
Is it in Zhou Qu _________ the terrible mudslide happened two months ago, killing more than one thousand people?
| A．where | B．when | C．which | D．that |
I really don’t like the way _____________ she speaks to her parents.
| A．that | B．when | C．which | D．what |
Rather than go through the extreme hot weather and see the World Expo, I prefer ______ at an air-conditioned room and watch TV.
| A．staying | B．to stay | C．stayed | D．had stayed |
—Have you finished your experiment report, Jane?
—Oh, my God. I’ve _____ forgotten all about that.
| A．strongly | B．really | C．entirely | D．freely |
He was told that it would be at least three more months ______ he could recover and return to work..
| A．when | B．before | C．since | D．that |