| 1. _______________ of water is vital to all plant and animal life. | | |
| 2. We need to find a more _______________ way to manufacture our products because our profit margin is too low. | | |
| 3. Warmer than average weather was the deciding _______________ in our decision to postpone our ski trip. | | |
| 4. Interest in the planet Mars has greatly increased since _______________ of water raised the possibility that life in some form may have evolved there. | | |
| 5. Music downloaders are questioning the _______________ of file sharing, claiming the law is unclear on the matter. | | |
| 6. Meetings will be held _______________ for the members of the project to discuss their progress. | | |
| 7. Jane Goodall's _______________ into chimpanzees has greatly increased our knowledge of these animals. | | |
| 8. We are _______________ obliged to deal with this firm. | | |
| 9. The DNA of chimpanzees shows a remarkable _______________ to that of humans. | | |
| 10. At the end of a research project, the researcher is normally faced with lots of observations which need to be _______________. | | |