点击购买此书全本PDF电子书
A Before Reading 1
1 The Water Supply 3
2 Storing and Cleaning Water 7
B While Reading 11
3 Water in the House 13
4 Waste Water 16
5 Saving Water 19
Points for Understanding 22
C After Reading 24
Answer Key 27
新标准中小学分级英语读物 32