A. centre B. thunderstorm C. steepen D. appreciate A. motionless B. refinement C. relaxation D. hopefully A. hike B. someday C. despite D. put out A. post office B. clearly C. eccentric D. experience A. slow down B. couch C. earthquake D. abstract A. cause B. dimension C. Mr D. vitamin A. fanatical B. sacrifice C. worldwide D. archaeological A. English book B. lightning C. laughed D. place order A. jumping rope B. hum C. headline D. tidal A. crowded B. wave C. account D. grayish