—Have you finished your homework yet?
—Not yet, I ___ to do it just a few minutes ago.
| A．get down | B．set out | C．set about | D．set up |
You can’t imagine what great trouble they have _____ the problem _____.
| A．to solve; being talked about | B．solving; discussing |
| C．to solve; to talk about | D．solving; being discussed |
It was getting dark; I found a car _____ in a pool by the side of the road.
| A．to be stuck | B．stuck | C．sticking | D．stick |
In January , 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
| A．it marked | B．marking | C．marked | D．to mark |
The old farmer, _____ the badly injured and burnt soldier, came out of the burning farmhouse, calling continuously for help.
| A．supporting | B．having supported |
| C．being supported by | D．being supported |
To answer correctly is more important than _____.
| A．that you finish quickly | B．finishing quickly |
| C．to finish quickly | D．finish quickly |