【题目】 _________ the task on time, he was fired by the boss.
A. Not completed B. Not having completed
C. Not have completed D. Not being completed
在线课程【答案】B
【解析】
试题分析：考查非谓语动词。句中逻辑主语为he，与complete之间为主动关系，且具有时间的先后性，故用having done。句意：没有准时完成任务，他被老板开除了。故B正确。