21. Laos is A. drier 22. The Amazon is A. wide 23. The train runs at 120kph, A. slowly than Vietnam. B. dryer C. more dry D. more drien than any other rivers in the world because it's the widest one. B. width while the plane flies B. more slowlier 24. It is day of the year. A. the shortest B. shorter 25. The kitchen is A. largest 26. It's than the bedroom. B. the largest novel I've ever read. A. the most romantic B. most romantic C. wider D. more wide at 1,000kph. The train is much than the plane. C. slower D. more slow D. more short D. larger C. the most short C. more large C. more romantic D. romantic 27. Suddenly, I think I really need a short vacation. I says to my boss "I be off one travel." A. need B. will 28- My teacher's advice is that I A. should 29- He says he A will be 30. Listen! These girls A. are singing B. shouldn't C. won't D. should pay more attention in her lessons. C. must C. shall not be C. sings late for school next time. B. shall be "Happy rthdayt^ prime prime B. sing D. mustn't D. won't be D. is singing