Unit 1. 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 2. 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 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?
Unit 7. Questions 1-2
Question 1. Progress check
Which elements should be changed?
Question 2. Progress check
Which elements should be changed?
Unit 8. 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?
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