A. future B. tend C. millennium D. drink to A. habit B. untold C. service D. learn A. firefighting B. trunk C. line D. console A. travel agent B. hand on C. crystal D. illness A. reward B. blessing C. storybook D. work of art A. the Opera House B. smarter C. tiny D. swarm A. grateful B. evil C. flies D. a bunch of A. elderly B. improve C. source D. system A. expert B. towards C. noise D. inspection A. can't help doing B. no doubt C. plant D. e-friend