TASK 6: Supply linking words or phrases that enhance the flow of the passage. Look carefully at the punctuation to help you make an appropriate choice.
Many modern artists are using computers in their work because these machines enable the artist to be more creative.  Some artists believe computers will gain in popularity; ________________ , others feel they will have at best a fleeting presence in the art world.  The computer is not a conventional art tool exactly like a brush, pencil, or hammer; ________________ , it is a tool that provides greater flexibility. ________________ the use of computers for artistic purposes seems somewhat unusual, researchers believe their use will indeed become more widespread in the next century.  Changes can be made quickly and easily when artists use computers. ________________ copying portions of a painting, drawing, or musical composition can be done with a keystroke, ________________ saving the artist considerable time. ________________ some initial resistance, the artistic community is beginning to realize that technology can indeed play a role in creativity.
TASK 7: Put in a summary word to complete each sentence.
1. In the United States, the levels of lead, carbon monoxide, and sulfur dioxide have fallen between 1978 and 1987. Despite this ___________, the air is still contaminated by many carcinogens.
2. Ozone levels in the United States increased 5% from 1986-87, another 15% from 1987-88, and an additional 10% from 1988-90. Environmental Protection Agency (EPA) officials are concerned that if this ___________ continues, serious environmental damage may occur.
3. The EPA has revealed that 20 of the 320 known toxic chemicals in the air probably cause more than 2,000 cases of cancer annually. While this ___________ may not seem high, it is still a cause for concern.
4. The EPA states that individuals living near chemical plants have a higher than normal chance of developing cancer. This ___________ has been substantiated by numerous studies.
5. The Chemical Manufacturers Association has decided it will more strongly support the pollution control efforts of the EPA. This ___________ was a major factor in the drafting of new regulations.
6. Lawmakers in southern California are proposing banning the sale of new charcoal grills, requiring sophisticated pollution control devices, and demanding that by the next century 40% of all cars and buses run on clean fuel, such as methanol. These ___________ may indeed become law in the near future.