31．The computer software is old, ______very out of date．
| A．or rather | B．rather than | C．other than | D．more than |
The microphone enabled them to keep in touch, in other words, it made it _____ for them to contact each other.
| A．likely | B．capable | C．possible | D．probable |
In spite of the thunderstorm, the children slept _____ all night.
| A．densely | B．soundly | C．loudly | D．noisily |
It was decided to _____ the search when there was no hope of finding the missing girl alive.
| A．call off | B．take up | C．keep off | D．ring up |
He put in a special _____ for an extra day's holiday so that he could attend his daughter's wedding.
| A．request | B．demand | C．inquiry | D．proposal |
Scientists have to work hard to keep _____ with modern discoveries and developments.
| A．company | B．track | C．touch | D．pace |