The twin brothers stand under the tree, ______ and say nothing.
| A．puzzled | B．puzzling |
| C．being puzzling | D．being puzzled |
Due to lack of protection, the hills which used to be covered withgreen trees are now mostly _________
A. blankB. bare
C. vacantD, hollow
It is generally agreed _________ education is vital for the development of individuals and the well-being of society.
| A．if | B．because |
| C．when | D．that |
George is _________ a very serious man, but as a matter of fact he has a great sense of humour.
| A．obviously | B．absolutely |
| C．apparently | D．occasionally |
He has learned to get on with all kinds of people and _________ todifferent ways of life.
| A．addict | B．agree |
| C．add | D．adjust |
The town has _________ population of ten thousand and 80% of _________ population are peasants.
| A．a; the | B．a; / |
| C．/; the | D．/；/ |