9. If you don't study hard, you will fail your exam

10. I suggest that Lan should read books before going to bed

11. Though Ba felt very tired, he try hard to finish his homework last night

12. The vegetables which we bought from the supermarket yesterday are fresh

13. If we use public buses, we can avoid traffic jams

14. Tom is a fast runner

15. Liz is a careful taxi driver

16. It rained heavily so I took along a raincoat

17. The teacher suggested that Ha Long Bay should be one of the World Wonders

18. Last summer, we stayed in a hotel which is very luxurious

19. Nobody else is better than Lan in our class

20. Although Minh was carefull, he broke the glass

21. I suggest the machine be checked before we use it

sai sót thì mong thông cảm ạ