1. A. laugh B. cough C. bought D tough 2. A. calorie B. labour C. community D. volunteer 3. A. environmental B. condition C. patient D. station 4. A. danced B. helped C. watched D. enjoyed 5 A. knocked B. needed C. founded D. wanted 6. A. cough B. laugh C. enough D. high 7. A. collect B. clean C. city D. cracker 8. A. bird B. girl C. first D. sister 9. A. burn B. sun C. hurt D. turn 10. A. musical B. delicious C. special D. ocean