A. embarrass B. experience C. sent D. coast A. machinery B. tram C. strengthen D. expert A. taxi B. ancient C. marker D. diary A. account B. blandishment C. curtsy D. angry A. pyramid B. puzzled C. teenager D. duck A. acknowledge B. firefighting C. in half D. a glass of A. solve B. air conditioning C. rapids D. African A. state B. teahouse C. windbreaker D. halfway A. unreasoning B. advice C. spend doing D. exactly A. millimeter B. careless C. millennium D. user-friendly