My son ____ the examination, but he wasn't careful enough.
| A．might be able to pass | B．must have passed |
| C．could have passed | D．were able to pass |
Let us not waste ______ time we have left.
| A．the little | B．little | C．a little | D．a little more |
The news about the terrible flood there greatly discouraged ______ there for a sight-seeing.
| A．us from going | B．us to go | C．our going | D．our to go |
______ all the possibilities, I really believe that I’d prefer to make any change now.
| A．Considering | B．Considered | C．To consider | D．Consider |
Nobody could______it when the bull broke into the shop and attacked two customers with its horns. The others just hurried away from it.
| A．make | B．help | C．aid | D．assist |
He appears ______ a long time. He is impatient for my arrival.
| A．to wait | B．to be waiting | C．to have waited | D．to have been waiting |