UNIT 1 1
1．The Standard of Living 1
2．Descending the Rapids 5
UNIT 2 9
3．Influenza 9
4．The Police Computer 13
UNIT 3 17
5．Conquering the Channel 17
6．Cheap and Lovely 21
UNIT 4 25
7．Hunting for Viruses on the Amazon 25
8．The Psychology of Money 29
UNIT 5 33
9．Behind Enemy Lines 33
10．The City of the Future 37
UNIT 6 41
11．Sister Cities 41
12．"Ear-Sight" 45
UNIT 7 49
13．Thank Him or Kick Him? 49
14．Gold 53
UNIT 8 57
15．The View from Out There 57
16．Greenwich Mean Time 61
UNIT 9 65
17．Our Changing Environment 65
18．How Far Can You Think? 69
UNIT 10 73
19．The Banana 73
20．Tchaikovsky(1840-1893) 77
Key to Comprehension Exercises 81