●●●●● ●●●● ●●0 What are they for? ●●● ●●●● Key:1.c 2. f 3. b 4. a 5e 6. d If you want to learn more Key: 1.i 2. f 3. b 4h 5.c 6.d7.e8.g9.aWhat are they for? Key: 1. c 2. f 3. b 4. a 5. e 6. d If you want to learn more Key: 1. i 2. f 3. b 4. h 5. c 6. d 7. e 8. g 9. a