A. headmaster B. immigrate C. sand D. return A. commission B. wear C. coke D. ornament A. smooth B. stepsister C. black-and-white D. leaf A. No smoking B. dilapidated C. flower D. pull down A. peak B. nonsense C. worthwhile D. weather A. having class B. keep away C. guess D. permanently A. remember B. extinction C. knee D. unwilling A. depressed B. positively C. roar D. October A. Pakistan B. certificate C. comfortable D. be in trouble A. photo album B. true C. summer D. pollution