A. prefer B. back C. sacrifice D. ambassador A. partial B. unable C. guard D. bactericidal A. show off B. obstacle C. mad D. familiar A. circle B. he C. involve D. proud A. varying B. crash C. Sydney Opera House D. extension A. wife B. are C. motor neurone disease D. band A. counter B. prove C. pain D. comedy A. recognize B. effect C. meaningful D. pal A. sticky B. action C. I dare you D. combine A. serve B. net C. migrate D. intelligence