British scientists have produced _____ they believe is the world's smallest Christmas card．
| A．which | B．who | C．that | D．what |
_____ 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 |
If our parents do everything for us children, we won’t learn to depend on .
| A．themselves | B．them | C．us | D．ourselves |