UNIT 1 THE STORY OF HELEN KELLER 1
UNIT 2 THE SPEED OF LIGHT 8
UNIT 3 AT THE FAIR（PART Ⅰ） 14
UNIT 4 AT THE FAIR（PART Ⅱ） 22
UNIT 5 ANIMAL INTELLIGENCE 30
UNIT 6 SIR ISAAC NEWTON 37
UNIT 7 THE MAN WHO COULD MAKE MIRACLES 46
UNIT 8 THE MISFORTUNES OF A MUSICIAN 55
UNIT 9 LIFE IN THE UNIVERSE 66
UNIT 10 THE MOONLIGHT SONATA 75
UNIT 11 THE MOONLIGHT SONATA（CONTINUED） 83
UNIT 12 THE SPACE SHUTTLE 91
UNIT 13 A NEW HEART DISEASE PREVENTON PROGRAM 98
UNIT 14 THE LONG SHADOW 106
UNIT 15 THE LONG SHADOW（CONTINUED） 113
UNIT 16 IN A WHIRLPOOL 122
KEY TO EXERCISES 131