29. In the centre is the bigest island in the bay. ____bigest => biggest___________
30. Big cities are much more better than the countryside. _______more better => better_____________
31. I must to go to the bank and get some money. ________must to => must_____________
32. Fansipan is Vietnam's the highest mountain. __________the highest => highest___________
33. That is the worse joke I've ever heard in all my life. _______worse => worst______________
34. Look! There is a 'NO PARKING' sign. You must park here. ______must => mustn't___________
35. This is the most quickest way to the hotel. _____most quickest => quickiest__________
36. We mustn't hurry or we'll late for class. _______mustn't => must______________