1. The first safety matches MAKE Sweden in 1844.
2. Morse code USE a lot during World War I.
3. Isaac Newton USE his discoveries to build a new kind of telescope.
4. Where LOCATE the main office? It is in Moscow.
5. No one knows exactly why Stonehenge BUILD.
6. No one knows exactly when a new bus station BUILD.
7. In 1493 pepper seeds CARRY from South America to Spain.
8. Apples MENTION in the Bible.
9. I believe they INTRODUCE the new teacher to us.
10. I believe the new teacher INTRODUCE to us tomorrow.
11. The plan must DISCUSS.
12. The new library OPEN next month.
13. The medicine USE widely now.
14. The rule EXPLAIN to them yesterday.
15. The teacher EXPLAIN the rule to them yesterday.
16. The rule can EXPLAIN tomorrow.
Ответ: 1. MAKE, 2. USE, 3. USE, 4. LOCATE, 5. BUILD, 6. BUILD, 7. CARRY, 8. MENTION, 9. INTRODUCE, 10. INTRODUCE, 11. DISCUSS, 12. OPEN, 13. USE, 14. EXPLAIN, 15. EXPLAIN, 16. EXPLAIN.