A. ban B. obstinately C. eighteen D. win A. every B. invention C. pencil-box D. historian A. diagnose B. dragon boat race C. mile D. long jump A. cheeseburger B. Pacific Ocean C. subject D. amusement park A. office B. month C. go swimming D. chip A. airmail B. come on C. extravagant D. ad A. good luck B. whimsical C. What would you like D. any time A. troublesome B. neighbour C. hydrogen D. hundred A. Qomolangma B. metre C. impoverish D. hidden A. weaken B. luck C. four D. correctly