3. Difference, activity, happiness, evidence, importance
4. 1)spacious 2) isolated 3) nosy 4) a vacuum 5) lack 6) silly
5. 1) works out 2) ?????? 3) spacious 4) lack 5) household chores 6) ?????
6. 1) to live 2) to rent 3) to spend 4) sharing 5) to tidy 6) to have
7 1) too tired 2) old enough 3) too windy 4) too difficult
8 1) to study 2) stealing 3) to stay 4) doing 5) visiting 6) seeing 7) to become 8) waking up 9) swimming 10) to help