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p166 Vocabulary %22the unknown%22

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

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

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