Part Ⅰ Text Exercises

Unit 1

Part Ⅱ Exercises for PRETCO

Unit 2

Part Ⅰ Text Exercises

Part Ⅱ Exercises for PRETCO

Unit 3

Part Ⅰ Text Exercises

Part Ⅱ Exercises for PRETCO

Unit 4

Part Ⅰ Text Exercises

Part Ⅱ Exercises for PRETCO

Test yourself(for Units 1-4)

Part Ⅰ Text Exercises

Unit 5

Part Ⅱ Exercises for PRETCO

Unit 6

Part Ⅰ Text Exercises

Part Ⅱ Exercises for PRETCO

Unit 7

Part Ⅰ Text Exercises

Part Ⅱ Exercises for PRETCO

Unit 8

Part Ⅰ Text Exercises

Part Ⅱ Exercises for PRETCO

Test yourself(for Units 5-8)

Test yourself(for PRETCO—Level B)