问答题发誓要找到真相，于是那位记者又开始为读者们挖掘新证据。(pledge)

【正确答案】Pledged to discover the fact，the journalist began to dig up new evidence for the readers．

【答案解析】pledge to do sth．发誓/保证要做什么。pledged to...，the journalist began...是过去分词作状语。dig up挖掘。