________ help the people in the snowstorm in the South made him worried.
| A．Not known how to | B．Unknown what to do to |
| C．His knowing not how to | D．His not knowing how to |
If I’m mistaken, _____ you are mistaken too.
| A．so | B．and |
| C．or | D．不填 |
If wishes were horses, _____ beggars would ride.
| A．and | B．so |
| C．or | D．不填 |
When the last prize had been awarded _____ everybody cleared off.
| A．and | B．so |
| C．or | D．不填 |
Although he had only entered the contest for fun, _____ he won first prize.
| A．but | B．and |
| C．even | D．不填 |
Just because they make more money than I do, _____ they seem to look down on me.
| A．so | B．and |
| C．but | D．不填 |