A. infection B. plan C. downhill D. start A. mouse B. cold-colored C. fire station D. bewilderment A. middle B. undertake C. customer D. knock A. cheer up B. eat out C. check D. Piccadilly A. wasn't B. due C. connect D. store A. become interested in B. say C. megacycle D. ticket A. Australia B. good-humouredly C. discovery D. nut A. sell B. email C. electrode D. entranced A. ought to B. violent C. finally D. snag A. worthwhile B. turn C. conference D. desperately