He made up his mind to devote his life the river polluted.
| A．to prevent, to be | B．to prevent, from being |
| C．to preventing, to be | D．to preventing, from being |
We will be losing money this year unless that new economic plan of yours __________ well.
| A．is working |
| B．works |
| C．will be working |
| D．worked |
"Life is like walking in the snow," Granny used to say, "because every step __________."
| A．has shown |
| B．is showing |
| C．shows |
| D．showed |
On Monday mornings it usually ________ me an hour to drive to work although the actual distance is only 20 miles.
| A．takes |
| B．is taking |
| C．took |
| D．will take |
From the _______ look on his face, I could tell that he failed in the exam.
| A．disappointed |
| B．disappointing |
| C．excited |
| D．exciting |
I promised to buy my son a new bike, but this time I have to ________ him.
| A．envy |
| B．please |
| C．amaze |
| D．disappoint |