A. pencil-box B. platform C. imperceptible D. carbon dioxide A. plenty B. let down C. worm D. greedy A. train B. unsure C. middle-aged D. tend A. cinquain B. Motherland C. compulsory D. bar A. secret B. Geneva C. shut off D. blizzard A. dweller B. approach C. manifest D. Bombay A. steward B. beaten track C. catch D. speak English A. workplace B. express C. station D. louder A. caveman B. predecessor C. Berlin D. just then A. foundations B. rectangular C. return D. quote