A. Underwater World B. explorer C. black D. adjust to A. headline B. videophone C. brainstorm D. before long A. qualification B. South American C. for ever D. entitle A. note B. destination C. whom D. spring A. cage B. artiste C. talk back D. hydrogen A. agent B. botany C. arrive at D. fall down A. great-grandpa B. abundant C. hardworking D. consult A. hoverboard B. queue C. together D. end A. food chain B. second C. make an effort D. draft A. tomb B. lay C. cargo D. than