CONTENTS 1
Chapter 1:THE FOUR SEASONS,Part Ⅰ:SPR ING-TIME 1
Chapter 2:THE FOUR SEASONS,Part Ⅱ:SUMMERDAYS 4
Chapter 3:THE FOUR SEASONS,Part Ⅲ:AU- 7
TUMN 7
Chapter 4:THE FOUR SEASONS,PartⅣ:WINTER 11
Chapter 5:WHALES,Part Ⅰ 14
Chapter 6:WHALES,Part Ⅱ 17
Chapter 7:WHALES,Part Ⅲ 19
Chapter 8:SAILPLANES 21
Chapter 9:CYRUS H.McCORMICK,Part Ⅰ 24
Chapter 10:CYRUS H.McCORMICK,Part Ⅱ 27
Chapter 11:FROZEN FOODS 30
Chapter 12:HUNTING EAGLES,Part Ⅰ 33
Chapter 13:HUNTING EAGLES,Part Ⅱ 36
Chapter 14:WHAT IS A SEQUOIA？ 38
Chapter 15:THE MISSISSIPPI RIVER 41
Chapter 16:TELLING TIME,Part Ⅰ 45
Chapter 17:TELLING TIME,Part Ⅱ 49
Chapter 18:TELLING TIME,Part Ⅲ 52
Chapter 19:SALTY,SOUR OR SWEET？ 56
Chapter 20:THE COVERED WAGON,Part Ⅰ 59
Chapter 21:THE COVERED WAGON,Part Ⅱ 62
Chapter 22:CHEWING GUM 65
Chapter 23:CHARLES A.LINDBERGH,Part Ⅰ 68
Chapter 24:CHARLES A.LINDBERGH,Part Ⅱ 71
Chapter 25:CHARLES A.LINDBERGH,Part Ⅲ 74
Chapter 26:TELEVISION 77
Chapter 27:AIR POLLUTION 80
Chapter 28:WHAT IS QWERTY？ 83
Chapter 29:A STORY OF COURAGE,Part Ⅰ 86
Chapter 30:A STORY OF COURAGE,Part Ⅱ 89
Chapter 31:A STORY OF COURAGE,Part Ⅲ 92
Chapter32:A STORY OF COURAGE,Part Ⅳ 95
Chapter 33:COLORS IN NATURE 98