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John assured his boss that he would ____ all his energies in doing this new job. A. call forth B. call at C. call on D. call off [call forth] call forth 投入, 引起, 引发 [/call forth] [call at] call at 拜访(某地) [/call at] [call on] call on 拜访(某人) [/call on] [call off] call off 取消 cancel 取消 [/call off] [evoke] evoke 引起, 引发, 唤起 provoke 引起, 引发 initiate 引起，引发 arose 引发, 唤起 trigger 引起, 引发, 扳机 on duty 轮流值日 rise 升起, 上升 appear 出现 arise 出现 arouse 引起 raise 举手, 出手, 提出, 养育 disaster 灾难 elixir 万能药 | 
