5. unless( nếu không )
6. works( điều kiện loai1)
7. seing
8. of/to
9. speaking
10. asked
II. Choose the underlined word
11. so good-> well
12. suprising-> suprised
III. Choose the word or phrase
13. in
14. known( được biết)
15. eaten
16. carrying
17. at
18. on