A. on earth B. second C. cashier D. flee A. show up B. humanitarian C. keep a secret D. science A. unexplained B. zip C. let out D. musical A. moral B. translation C. horse D. study A. astonishing B. freeway C. inbox D. usually A. eleven B. freedom C. gold D. shell A. fossil B. real-life C. egg D. take a shower A. communication B. pace C. swim D. yourselves A. take turns B. Internet C. contract D. verbal A. touch B. yours faithfully C. that D. fairly