KEY: () = preposition
[] = prepositional phrase
1. Salt Lake City, Utah's capital and largest city, was founded [(in) 1847].
2. Janice and Carla spent the day [(at) the mall].
3. Standard time was adopted [(in) the United States] in 1884.
4. The geographic center of the United States is [(in) Kansas].
5. The first safety lamp for miners was invented by Sir Humphrey Davy (in) 1816.
6. Many people of North Borneo live in houses that have been built [(on) stilts] in the Brunei River.
7. The children were charmed [(by) the magician's tricks].
8. We visited the Royal Ontario Museum [(in) Canada].
9. The first automobile show was held [(in) "New York City] in 1900.
10. Self-government in the United States began [(in) Jamestown] in 1619.
11. The first street railway in the world was built [(in) New York] in 1832.
12. The inventor of the telephone was born [(in) Scotland].
13. Who is the inventor [(of) the printing press]?
14. The shadowy outline [(of) the giant skyscrapers] loomed before us.
15. Our small boat bobbed [(in) the waves].
16. The swivel chair was invented [(by) Thomas Jefferson].
17. A raging storm fell [(upon) the quiet valley].
18. I was lulled into sleep by the patter [(of) the rain].
19. We found acorns [(beneath) the tree].
20. That cow is standing in the middle [(of) the road].