A. yours sincerely B. bark C. geology D. unexplained A. disappearance B. meanwhile C. beg D. cute A. active B. pencil sharpener C. advisory D. reading room A. rim B. territory C. alone D. sometimes A. situated B. altitude C. impossible D. polite A. stereotype B. public C. talk D. mop A. party B. pin C. grain D. premium A. at most B. drink water C. helpful D. dine A. angrily B. but C. deadline D. handle A. pick B. friendly C. hiking D. by