. I think I was at school, ________ I was staying with a friend during the vocation when I heard the news.
| A．or else | B．or so | C．and then | D．even so |
__________ many students have known about the news, you, as our monitor, had better announce it officially in front of all the students.
| A．Unless |
| B．Although |
| C．Once |
| D．Because |
__________ well prepared a gymnast is, he still needs a lot of luck in performing.
| A．Whatever |
| B．Although |
| C．No matter |
| D．However |
__________ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
| A．Although |
| B．As long as |
| C．If only |
| D．As soon as |
Mr. Black ________ English in a middle school ever since he came to China.
| A．have been teaching |
| B．has been teaching |
| C．had taught |
| D．taught |
The prices are fast these days. Nobody can get the prices _______.
A. going down ； to bring down
B. rising ； to be bringing down
C, raising ； bring down
D. going up ； brought down