Using a relative clause:My boss is an incredibly boring person. His predecessor was not a boring person at all.
【正确答案】正确答案：My boss is an incredibly boring person，which his predecessor was not at．all．
【答案解析】解析：要求改写成关系分句。这句话可以改写成一个非限制性关系分句。首先先行项应该是两句话中重复出现的a boring person。另外，当先行项强调人物的身份、地位、性格及品德时，引导非限制性关系分句的关系代词可选择which，并且该译句可以单独译成一个并列句。