| 1. Many _______________ of plants in the Amazon forest provide medicines which are very helpful to man. | | |
| 2. Turkey's land _______________ is unevenly divided between Europe and Asia. | | |
| 3. Engineers are _______________ the wreckage of the aircraft in an attempt to determine why it crashed. | | |
| 4. My wife put too much laundry in the washing machine and burned out the _______________. | | |
| 5. The sum of all the _______________ of a triangle is 180 degrees. | | |
| 6. France is part of the European Space Agency, which is developing _______________ to send satellites, and eventually people, into space. | | |
| 7. Are you _______________ sure that the man in the photograph is the one who attacked you in the park? | | |
| 8. The human body consists of one-third solid _______________ and two-thirds of a liquid similar to seawater. | | |
| 9. The only _______________ we have had today was about 10 minutes of light rain. | | |
| 10. The human _______________ only weighs about 1500 grams. | | |
| 11. The children always use their _______________ for their math homework, but it would be much better if they figured out the answers in their heads. | | |
| 12. A diamond will not _______________ in acid. | | |
| 13. Man's view of the Earth and the dynamics of how it changes is seen by some scientists as one the most significant _______________ of our century. | | |