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 |
______ to reach them on the phone, we sent an email instead.
| A．Fail | B．Failed |
| C．To fail | D．Having failed |
He didn’t make____clear when and where the meeting would be held.
| A．this | B．that | C．it | D．these |
Only then _________the importance of my health.
| A．did I realize | B．had I realized | C．I realized | D．I had realized |
He is a foreigner and he is not accustomed _______like that while he i8 tn China．
| A．treating | B．to be treated | C．to being treated | D．to treat |
______ their hats into the air, the fans of the winning team let out loud shouts of victory.
| A．To throw | B．Thrown |
| C．Throwing | D．Being thrown |