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. Question 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. 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 1-4
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 6. Questions 1-3
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?
Unit 7. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 9. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 10. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 11. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
Unit 12. Questions 1-2
Question 1. Progress Check
Which elements should be changed?
Question 2. Progress Check
Which elements should be changed?
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