The government must take measures to prevent the river __________.
| A．polluted | B．polluting |
| C．from polluted | D．being polluted |
---Mike, our team will play against the Rockets this weekend. I’m sure we will win.
---________!
| A．Congratulations | B．Cheer up |
| C．Best wishes | D．Good luck |
I don't think the experiment is ___ failure, because it has provided us with ___valuable experience for our future tests．
| A．不填; 不填 | B．不填; a | C．a; 不填 | D．a; a |
As is known to us all, under no circumstances______ temporary economic development at the expense of the environment and resources.
| A．should we seek | B．we should seek |
| C．we had sought | D．had we sought |
We don’t care if a hunting dog smells _____, but we really don’t want him to smell ____.
| A．well, well | B．bad, bad | C．well, badly | D．badly, bad |
The present question is ____ many students consider it impossible ____ is really possible if effort is made.
| A．what; that | B．that ; that | C．that; what | D．what; what |