UNIT 2: Answer Key

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• Check and correct your answers after completing an exercise (but not before!).
• Note that the answers given here are not always the only correct answers.

LESSON 17

True/False, Questions/Answers, Exercise 1, Exercise 2, Exercise 3, Exercise 4, Exercise 5, Exercise 6

LESSON 18

Exercise 1, Exercise 2-a, Exercise 2-b, Questions, Exercise 3

LESSON 19

Questions-1, Questions-2, Exercise 1, Exercise 3

LESSON 20

Exercise 2, Exercise 3, Exercise 4, Exercise 5, Exercise 6

LESSON 21

Exercise 2, Exercise 3, Exercise 5

LESSON 22

Exercise 1, Exercise 2

LESSON 23

Exercise 1, Exercise 2, Exercise 3, Exercise 4

LESSON 24

Exercise 1, Exercise 2, Exercise 3

LESSON 25

Questions, Exercise 1, Exercise 2, Exercise 3, Exercise 4

LESSON 26

Completions, Questions, Exercise 1, Exercise 3, Exercise 4, Exercise 5, Exercise 6

LESSON 27

Completions, Exercise 1, Exercise 2, Problems

LESSON 28

Exercise 1

LESSON 29

Questions, Questions/Answers, Exercise 1, Exercise 2

LESSON 30

Completions, Exercise 1, Questions, Exercise 2, Exercise 3