Why does Man want to go to other planets (1) the solar system? Just for adventure? True, (2) is adventure in space travel. But a (3) to other planets would also be (4) . For example, space stations could be built that would give us (5) information about the weather. In space stations (6) around the earth, Man could live and study the cloud formation on (7) surface. These formations could tell us what weather to (8) in any part of the world at any time. (9) information would be useful to pilots, to ship captains, and even to farmers (10) must set dates for planting and harvesting. 1. A. in B. on C. at D. of 2. A. this B. there C. that D. it 3. A. travel B. fly C. trip D. drive 4. A. practice B. practiced C. practicing D. practical 5. A. valuable B. wealthy C. expensive D. amused 6. A. moves B. moving C. moved D. moveable 7. A. his B. her C. its D. their 8. A. hope B. believe C. consider D. expect 9. A. Such B. Those C. So D. These 10. A. which B. who C. whom D. whose