A. circumstance B. you C. remote D. humanitarian A. economy B. straightforward C. circus D. possible A. conservation B. have a headache C. colony D. flight A. enthusiast B. hoverboard C. on holiday D. pupil A. stressful B. hive C. soft toy D. wax disk A. minimum B. bomber C. speed up D. tonight A. manufacturer B. escape C. officially D. grass-seed A. jog B. at that time C. cattle D. preserve A. Scorpio B. wreck C. window D. make sense A. get into the habit of B. extravagant C. show sb around D. rediscover