31. This District Post Office is smaller than the Central Post Office
32. Antarctina is the coldest place in the world
33. You must arrive on time
34. Your neighbourhood is quieter than my neighbourhood
35. No beach in Vietnam is longer than Tra Co
36. Ha Noi is often warmer than Lang Son in winter
37. Traverling to moutain is boringer than traveling to beach
38. Our office buiding is lower than the skyscaper
39. Ho Chi MInh city is the biggest city in Vietnam with the population of over $8$ millions
40. Angel Falls is the highest fall in the world (with $1000$ feet higher than ảy others falls in the world
41. Lake Superior in North America is the largest freshwater lake in the world
