A. weren't B. my pleasure C. use D. polite A. air tank B. leader C. write D. biologist A. sugar B. email C. fourth D. sorry A. left B. compulsory C. cook meals D. regulation A. charming B. box C. incident D. wrong A. sell out B. turn C. sixth D. criticize A. window B. look out for C. engine D. dad A. computer B. sportswear C. walk off D. commodity A. tug of war B. mobile C. respectful D. mum A. right B. ten C. imperial D. outwards