B. Complete the following sentences with the appropriate forms of the words in parentheses
1. The ...... you write, the ...... your mark will be ( careful / bad )
2. It is ...... to drink the water because it has not been ...... yet ( possible / pure )
3. The trip was ...... ...... ( extreme / enjoy )
4. I believe in ..... diseases because ...... is always better than cure ( prevent )
5. The coal industry ...... private but was ...... in the 1940s ( origin / nation )