A. mass B. active C. observe D. sire A. luggage B. inland C. embarrassing D. method A. conversation B. twenty-three C. anything D. recycle A. atmosphere B. chemical C. ashamed D. plug A. turn into B. urgent C. been D. certainly A. bitter B. potato chip C. clear out D. citizen A. mask B. architecture C. conversion D. short A. take in B. splendid C. eyesight D. wasn't A. absolutely B. prize C. inhabitant D. pilot A. inconvenience B. belief C. sandstorm D. positively