Selecting a mobile phone for personal use is no easy task because technology so rapidly.
| A．is changing | B．will have changed |
| C．has changed | D．will change |
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 |
He was not an actor, who often appeared on stage, _____ a writer, writing stories.
| A．but | B．and |
| C．then | D．so |