A. cheer B. breakfast C. ratio D. practice A. shine B. swift C. take a look at D. dare A. spot B. mostly C. contain D. firework A. appendix B. fall off C. gum D. help yourself A. law B. run out C. regulation D. reserve A. arbitrary B. smoke C. switch on D. taste A. pity B. the United States C. global warming D. unutterable A. vitamin B. disease C. be harmful to D. pineapple A. go into B. harmful C. neither nor D. stomach A. quality B. fathom C. X-ray D. start