$\text{⇒ Answer:(Xem hình)}$

                                    $\text{-----Done by Lhghbebong-----}$

$\text{Cho anh xin câu trả lời hay nhất, 5 sao và cảm ơn nha.}$

$\text{Anh cần điểm cho nhóm.}$

$\text{Cam kết 100% chính xác nhé.}$

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