A. rarity B. grateful C. scorpion D. smooth A. lull B. help yourself C. contract D. name A. get lost B. air tank C. in practice D. microscope A. post B. tyre C. indifferently D. steady A. heal B. rock climbing C. accountant D. homeroom A. pathologist B. on the increase C. collect D. take pity on A. invention B. offender C. salary D. aid A. individual B. liner C. on one's mind D. inconvenient A. recur B. confusing C. Easter Bunny D. available A. eat up B. June C. wheelchair D. direct