A. look back at B. challenging C. amusement park D. oral A. fall asleep B. unfit C. flash D. performance A. confidence B. evident C. convertible D. pencil sharpener A. superstar B. settlement C. icy D. support A. hen B. skill C. take pictures D. focus A. garden B. obtain C. here we go D. tape A. stone B. thin C. disease D. mourn A. perturb B. daily C. low D. introduce A. pennant B. common C. virtue D. devour A. go for B. hobby C. model D. the Summer Palace