#1. 2. tent 3. flats
#2. 1b; 2f; 3e; 4d; 5a; 6c.
#3. dirty; old; untidy; noisy; insecure.
#4. smaller; smallest; most friendly; more difficult; easier.
#5. mustn’t ; don’t have to; can’t; must; can’t; rented; do; went; can’t; are dancing
#6.about; sorry; why; idea