Across
- 2. is used by the most people in the world
- 3. can make you understand the maps and customs
- 6. is about numbers
- 7. is old but interesting
- 8. is always used by Chinese
- 9. can tell you the rules about how things run
- 10. is about how people work
Down
- 1. can make you know animals and plants
- 4. is about how people cooperate
- 5. can tell you the phenomenons about how things change