A. sincerely B. observant C. pollution D. biography A. luck B. display C. professor D. landscape A. am B. increase C. tea art D. cooking A. eating lunch B. fore fathers C. sarcastic D. textbook A. valley B. punctual C. aid D. secure A. do some research B. where's C. belief D. cannibal A. Spain B. prison C. skating D. theater A. keep B. reform C. beneath D. craftsman A. vocabulary B. Austria C. plenty D. mariner A. wharf B. merely C. melon D. telegram