| 1. Drinking orange juice helps in the _______________ of iron in one's diet. | | |
| 2. The metric system is based on _______________ of ten. | | |
| 3. Someone told me that the _______________ coming off the screen of your computer can be dangerous for your health. | | |
| 4. Although the mass of a galaxy is difficult to determine, it is an important _______________ because it gives scientists important clues to the galaxy's origin and evolution. | | |
| 5. You can use presentation _______________ to create posters for conferences and exhibitions. | | |
| 6. The United States conducted its first test of an _______________ atomic bomb at 5:30 a.m. on July 16th, 1945. | | |
| 7. Saturn has the greatest number of known moons of any _______________ in the solar system. | | |
| 8. Most of the first year courses at the university are taught by _______________ instructors. | | |
| 9. In traditional African communities, cattle are considered a _______________ of wealth and prestige. | | |
| 10. The film _______________ "mature" means the movie should not be seen by a person under the age of 14, unless accompanied by an adult. | | |
| 11. She had to have _______________ surgery to determine the extent of her injuries. | | |
| 12. The _______________ in the room was still very tense after the argument was over. | | |
| 13. About 100 lightning _______________ strike the Earth each second. | | |