A. round B. sometime C. blur D. vest A. blow up B. Piccadilly C. break the ice D. middle A. home town B. middle school C. coin D. mammoth A. little B. efficiency C. altitude D. map A. southwest B. physics C. what D. No littering A. correlate B. must C. geography D. globe A. catastrophe B. advice C. cart D. September A. monitor B. keep on C. rhythm D. automatically A. high B. usage C. sincerely D. practise A. classmate B. be divided into C. fox D. pool