首字母填空 1
Earth and Nature 3
People and Life 12
Food and Health 22
Cities and Traffic 32
Sports and Recreation 43
Cultures and Customs 52
Relationships and Communication 63
Knowledge and Learning 72
Science and Scientists 83
Changes and Development 92
选词填空 103
Earth and Nature 105
People and Life 111
Food and Health 118
Cities and Traffic 124
Sports and Recreation 131
Cultures and Customs 138
Relationships and Communication 144
Knowledge and Learning 150
Science and Development 156
Different Fields 162
参考答案 169