The key to exercise solutions in chapter 5.2 - Grammar for the textbook Focus 3 (2nd edition) - Student's Book with authors Sue Kay, Vaughan Jones and Daniel Brawshaw from Pearson Education
Question
Discuss questions 1–3. Then read the text and check your ideas.
Answer
1.65 billion / 7 billion / 9.2 billion
More people live in cities than in the countryside.