Now a lot of new technology can _____ problems in industry.
| A．be applied to solve | B．be applied to solving |
| C．apply to solve | D．apply to solving |
It was 1920 ______ regular radio broadcasts began.
| A．while | B．when | C．that | D．since |
_____ is reported in the newspaper that talks between the two countries are making progress.
| A．Which | B．As | C．That | D．It |
Have you any knives？ I need a sharp ________.
| A．it | B．another | C． one | D．any |
Lucy has a great sense of humour and always keeps her colleagueswith her stories.
| A．amused | B．amusing | C．to amuse | D．to be amused |
Every few years, the coal workerstheir lungs X-rayed to ensure their health.
| A．are having | B．have | C．have had | D．had had |