A. Be careful B. North American C. ice D. stupid A. you bet B. purity C. frost D. for example A. increase B. scarf C. galaxy D. swing A. guess B. remain C. pain D. parden A. bee B. lower C. take after D. pronounce A. perilous B. be strict with C. injury D. chopsticks A. appear B. punctually C. have got D. pollute A. biologist B. common C. logical D. bed A. west B. flush C. itself D. mermaid A. adventurer B. cloud C. housewife D. abroad