A. textbook B. guitar C. visit D. firefighter A. protein B. account for C. necessary D. sincerity A. enjoy oneself B. come to power C. reservoir D. fail A. honest B. cosmology C. sun cap D. bear A. bill B. have breakfast C. satiation D. conspire A. inhabitant B. grape C. last word D. read out A. model B. volunteer C. take photos D. so A. knowledge B. cold-colored C. tourism D. fragile A. go to the beach B. swim C. backstage D. no longer A. pocket money B. frighten C. enthusiast D. exempt