Across
- 3. a kind of green vegetable
- 5. the loud sound which is made by dogs
- 8. protect sth. or prevent sth. from being destroyed
- 9. it
- 10. a giant reptile which has massive jaw and rough skin
- 11. plants or dull life
- 13. to move around in a circle
Down
- 1. an object shaped like a ball
- 2. duty，sth. has to do
- 4. interests you and makes you
- 6. replace or recover
- 7. very salty
- 12. a place where kids study and play