A. humanity B. pop C. wait a moment D. organizational A. do one's best B. treat C. wire D. usage A. hand B. stumble C. culture D. America A. What's wrong with B. sorrow C. ask D. valid A. exercise B. broken C. essay D. passenger A. by B. worn-out C. product D. great A. photograph B. pause C. on the weekend D. ninepin A. memory-chip B. cinema C. concept D. hiking A. naval B. festival C. absurd D. convenient A. rid B. depressed C. cut D. pole