UNIT 1 INFORMATION OVERLOAD 1
UNIT 2THE ACHILLES HEEL 17
UNIT 3 EARLY TOBED， EARLY TO RISE 35
UNIT 4 ANIMAL INTELLIGENCE 51
TEST 1 68
UNIT 5 LONGEVITY：REFUSING TO BE INVISIBLE 73
UNIT 6 GIVING TO OTHERS：WHY DO WE DO IT？ 91
UNIT 7GOODBYETO THE SIT-DOWN MEAL 109
UNIT 8 NO TECHNOLOGY？ NO WAY！ 127
TEST 2 144
国际音标表 148
著作权人名单 149