Mark the letter A,B,c,D
1. ensure
2. century( đọc là s)
3. machine
4. engrave ( trọng âm 2 còn lại 1)
5. bombardment( trọng âm 2 cái còn laij1 )
6. as big as
7. cheaper
8. further
9. established( thành lập)
10. relic( cổ vật)
11. attract( thu hút)
12. as slow as
13. taller
14. arrived
15. the most modern
16. was used to be
17. proud
18. construction
19. doctor laureates
20. grow well
21. used to
22. as much an
23. much harder
24. more and more
