Lesson 1 Art and Literature(1) 1
Lesson 2 Art and Literature(2) 9
Lesson 3 Medicine and Health 17
Lesson 4 Social Problems(1) 25
Lesson 5 Social Problems(2) 33
Lesson 6 Agriculture and Environment 41
Lesson 7 Communication 49
Lesson 8 Education(1) 57
Lesson 9 Education(2) 64
Lesson 10 Investigation and Discovery(1) 71
Lesson 11 Investigation and Discovery(2) 79
Lesson 12 Investigation and Discovery(3) 87
Lesson 13 The Animals 94
Lesson 14 Living and Recreation(1) 101
Lesson 15 Living and Recreation(2) 108
参考答案 116