Unit1HowlongistheGreatWall?大声读出出现的数字tentwentythirtyfortyfiftysixtyseventyeightyninetyonehundredtwohundredthreehundredfourthousandtwothousandthreethousandonethousandfivethousandsixthousandseventhousandeightthousandninethousandWhatcanyousee?Icansee….1,0002,0003,00023,00010,0009,0008,00014,00055,000100,000onethousandtwothousandthreethousandtwenty-threethousandtenthousandninethousandeightthousandfourteenthousandfifty-fivethousandonehundredthousandWhatcanyouhear?1220501006080189912,00020,0005,0001,00060,00080,00018,00099,000Readthetext,andanswer:HowlongistheGreatWall?It’sfivethousandkilometres.XiangtanChangshaHowlongisit?40kilometresIt’sfortykilometreslong.BeijingChangshaHowlongisit?It’s1,700kilometreslong.1,700kilometresBeijingShanghaiHowlongisit?It’s1,463kilometreslong.1,463kilometresShenzhenChangshaHowlongisit?It’s869kilometreslong.869kilometres量一量,比一比,说一说Howlongisyourdesk?It’s57centimetreslong.Howlongisyourruler?It’s…Howlongisyourpen?It’s…Howlongisyourpencil?It’s…HowoldistheGreatWall?It’smorethantwothousandyearsold.Readandanswer.1.WheredoesSimonwanttogo?2.WhatisneartoDaming’shome?3.CantheywalkalloftheGreatWall?4.Howoldisthemoon?Readandanswer.1.WheredoesSimonwanttogo?2.IsitneartoDaming’shome?SimonwantstogototheGreatWall.Yes,itis.3.CantheywalkalloftheGreatWall?Why?4.Howoldisthemoon?No,theycan’t.Becauseit’stoolong.Itismillionsof(几百万)yearsold.