A. reliable B. helpful C. droop D. grandad A. neighbour B. explore C. early D. musical A. shrug B. a lot C. fatuous D. what's wrong A. unexplained B. complication C. email D. a box of A. saying B. rudder C. security D. fluency A. comeback B. pizza C. ridge D. notes A. spatial B. the Great Wall C. flag D. net A. flute B. firework C. let D. twenty-first A. hero B. birdwatching C. fill out D. ahead of A. cast B. now and then C. number D. do