A. safety B. be worried about C. climbing D. reason A. in vain B. Traveling C. mind D. by boat A. ready B. opposite C. effective D. well-known A. over B. bathe C. Egypt D. except A. defend against B. hybird rice C. news D. purple A. bought B. operate C. take care of D. happen A. dismiss B. lose C. development D. revolutionary A. soundly B. afresh C. appear D. start A. relief B. disappoint C. meaningless D. potassium A. soap B. take into C. Scotland D. yacht