第一章　难度等线*
　Reading Exercise 1
　Reading Exercise 2
　Reading Exercise 3
　Reading Exercise 4
　Reading Exercise 5
　Reading Exercise 6
　Reading Exercise 7
　Reading Exercise 8
　Reading Exercise 9
　Reading Exercise 10
第二章　难度等级**
　Reading Exercise 11
　Reading Exercise 12
　Reading Exercise 13
　Reading Exercise 14
　Reading Exercise 15
　Reading Exercise 16
　Reading Exercise 17
　Reading Exercise 18
　Reading Exercise 19
　Reading Exercise 20
第三章　难度等级***
　Reading Exercise 21
　Reading Exercise 22
　Reading Exercise 23
　Reading Exercise 24
　Reading Exercise 25
　Reading Exercise 26
　Reading Exercise 27
　Reading Exercise 28
　Reading Exercise 29
　Reading Exercise 30
参考答案