A. meaningful B. vitality C. advertiser D. keep it secret A. worried B. necessary C. zoology D. colony A. floor B. dark C. closely D. preserve A. one-to-one B. go into hiding C. snobbery D. national A. make friends B. good evening C. homeless D. each other A. operation B. string bean C. proud D. guide A. totally B. organization C. charming D. clearly A. element B. go C. gold D. twenty A. drug B. Olympic Games C. exhilaration D. pneumonia A. broker B. prevent from C. north-west D. none