A. middle B. physicist C. bend D. taikonaut A. police B. hospital C. expedition D. realize A. sediment B. check out C. walk on D. get in A. status B. arsenic C. crust D. embarrass A. sense B. member C. swallow D. terrace A. hover-train B. tooth C. opening D. writer A. repetitive B. cigar C. response D. porcupine A. watch a film B. boat C. navigation D. taboo A. health B. topography C. mistake for D. north A. gold B. lantern C. sounding D. access