Ⅰ．Workbook 1
Unit One Environment Report 1
——Aluminum 1
——Dyslexia 6
Unit Thre e The Making of a Nation(1) 9
Unit Four The Making of a Nation(2) 15
Unit Five The Making of a Nation(3) 21
Unit Six Science Report——Cancer 25
Unit Seven Space and Man——Diabetes(1) 28
Unit Eight Space and Man——Diabetes(2) 32
Unit Nine Space and Man——Diabetes(3) 36
Unit Ten The President's Cabinet 39
Unit Eleven Environment Report——The Giant African Land Snail 43
Unit Twelve Science in the News——Depression(1) 49
Unit Thirteen Science in the News——Depression(2) 51
Unit Fourteen Science in the News——Depression(3) 54
Ⅱ．Suggested Keys to the Exercises 57
Ⅲ．Tapescript 67
Unit One 67
Unit Two 69
Unit Three 71
Unit Four 73
Unit Five 75
Unit Six 77
Unit Seven 79
Unit Eight 81
Unit Nine 84
Unit Ten 86
Unit Eleven 88
Unit Twelve 90
Unit Thirteen 92
Unit Fourteen 94