目录Unit 13 The world's population 1
Lesson 49 2
Lesson 50 2
Lesson 51 3
Revision(Lessons 49-52) 4
Unit 14 Shopping 9
Lesson 53 10
Lesson 54 11
Lesson 55 12
Revision(Lessons 53-56) 12
Unit 15 A doctor for animals 19
Lesson 57 20
Lesson 58 20
Lesson 59 21
Revision(Lessons 57-60) 22
Unit 16 The football match 28
Lesson 61 29
Lesson 62 30
Lesson 63 30
Revision(Lessons 61-64) 31
Unit 17 The missing necklace 37
Lesson 65 38
Lesson 66 39
Lesson 67 40
Revision(Lessons 65-68) 41
Unit 18 Mainly Revision 46
Lesson 69 47
Lesson 70 48
Lesson 71 49
Revision(Lessons 69-72) 50
综合卷（一） 56
综合卷（二） 64