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p166 Vocabulary %22the unknown%22

Author: jeong jae won
Description:
Keywords: , , , , , , online teaching

Content:
Definitions:
0. the unknown
1. explorer
2. 2
3. research
4. efficiently
5. vision
6. expedition
7. reliable
8. 1
9. courageous
10. 4
11. economically
12. risk
13. 5
14. 3
15. revolution

Answers:
0. the chance something bad might happen
1. an idea or dream of what could happen
2. carefully, without wasting money
3. brave
4. someone who travels to places no one has ever visited
5. dependable
6. a complete change in how we do things
7. 2
8. the study of a subject to learn new facts
9. a place no one has ever been
10. 3
11. using time, money, or effort effectively
12. 4
13. 5
14. a carefully planned trip, especially to a dangerous place
15. 1
.