Unit 1 Nature in the balance
Welcome to the unit
Reading
Grammar and usage
Integrated skills
Extended reading
Project
Unit 2 Natural disasters
Welcome to the unit
Reading
Grammar and usage
Integrated skills
Extended reading
Project
Unit 3 The world online
Welcome to the unit
Reading
Grammar and usage
Integrated skills
Extended reading
Project
Unit 4 Scientists who changed the world
Welcome to the unit
Reading
Grammar and usage
Integrated skills
Extended reading
Project
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