Keys ex 3 and 4 p 53-54 WB
2 Key: 1 A 2 A 3 B 4 B 5 A 6 B
3 Key: 1 endangered wealthy 2 donate responsibility 3 pollute donate 4 Refugee Litter 5 reusable contribute 6 litter famine 7 responsibility reusable 8 wealthy endangered 9 famine refugees 10 contribute pollute