第22题: [单项选择]The young man assured the boss that he would ______all his energies to do the job well. A. call on B. call forth C. call at D. call off 参考答案:B 答案解析:此题考查短语动词。Call on访问:号召。call forth 使产生:使起作用,填入此句中“call forth all his energies to do the job well (全力以赴