Unit 1. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 2. Questions 1-4
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Question 3. Progress Check
Which elements should be changed?
Question 4. Progress Check
Which elements should be changed?
Unit 3. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 4. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 5. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 6. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?