A. reach B. vernacular C. opera D. affluent A. Chinese book B. background C. cheer D. potato chip A. commercialization B. challenge C. take care D. collect toy cars A. help oneself B. take place C. north-west D. upward A. frightful B. pensioner C. penholder D. ticket A. enjoy oneself B. bring C. pen pal D. surface A. special B. underestimate C. obligation D. hope A. thanks to B. half an hour C. colourful D. champagne A. gunpowder B. taste C. environment D. pick out A. themselves B. evolve C. boldly D. Paris