第一部分：教学辅导 1
Unit1 In the library 1
Unit2 Water sports 6
Unit3 Make our world more beautiful! 11
Unit4 Travel 14
Unit5 Have a good time! 18
Unit6 Mainly revision 22
Unit7 A man who never gave up 26
Unit8 Merry Christmas! 31
Unit9 What is it mado of? 37
Unit10 When was it built? 41
Unit11 Planting trees 46
Unit12 Mainly revision 52
第二部分：课后练习 57
Lesson 1 and lesson 2课后练习 57
Lesson 3 and lesson 4课后练习 58
Lesson 5 and lesson 6课后练习 59
Lesson 7 and lesson 8课后练习 60
Lesson 9 and lesson 10课后练习 61
Lesson 11 and lesson 12课后练习 62
Lesson 13 and lesson 14课后练习 63
Lesson 15 and lesson 16课后练习 64
Lesson 17 and lesson 18课后练习 65
Lesson 19 and lesson 20课后练习 66
Lesson 21 and lesson 22课后练习 67
Lesson 23 and lesson 24课后练习 68
Lesson 25 and lesson 26课后练习 69
Lesson 27 and lesson 28课后练习 70
Lesson 29 and lesson 30课后练习 71
Lesson 31 and lesson 32课后练习 72
Lesson 33 and lesson 34课后练习 73
Lesson 35 and lesson 36课后练习 74
Lesson 37 and lesson 38课后练习 75
Lesson 39 and lesson 40课后练习 76
Lesson 41 and lesson 42课后练习 77
Lesson 43 and lesson 44课后练习 78
Lesson 45 and lesson 46课后练习 79
Lesson 47 and lesson 48课后练习 80
Unit1综合测试 81
第三部分：单元测试 81
Unit2综合测试 83
Unit3综合测试 85
Unit4综合测试 87
Unit5综合测试 89
Unit6综合测试 91
Unit7综合测试 93
Unit8综合测试 95
Unit9综合测试 97
Unit10综合测试 99
Unit11综合测试 101
Unit12综合测试 103
课后练习参考答案 105
单元测试参考答案 109