Unit 8, Page 83, Exercise 2

Unit 8, Page 82, Exercise 1

Unit 8, Page 81, Exercise 3

Unit 8, Page 80, Exercise 2

Unit 8, Page 80, Exercise 1

Unit 8, Page 79, Exercise 3B

Unit 8, Page 79, Exercise 3A

Unit 8, Page 78, Exercise 2B

Unit 8, Page 78, Exercise 2A

Unit 8, Page 78, Exercise 1

Unit 8, Page 77, Exercise 4

Unit 8, Page 77, Exercise 3

Unit 8, Page 76, Exercise 2

Unit 8, Page 76, Exercise 1

Unit 7, Page 73, Exercise 2

Unit 7, Page 72, Exercise 1

Unit 7, Page 71, Exercise 3

Unit 7, Page 70, Exercise 2

Unit 7, Page 70, Exercise 1

Unit 7, Page 69, Exercise 3