Unit 1. Questions 1-3

Question 1. Resources

Which elements should be changed?

Question 2. Resources

Which elements should be changed?

Question 3. Resources

Which elements should be changed?

Unit 2. Questions 1-2

Question 1. Resources

Which elements should be changed?

Question 2. Resources

Which elements should be changed?

Unit 3. Question(s) 1

Question 1. Resources

Which elements should be changed?

Unit 4. Question(s) 1

Question 1. Resources

Which elements should be changed?

Unit 5. Question(s) 1

Question 1. Resources

Which elements should be changed?

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