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p166 Vocabulary %22the unknown%22

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

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

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