第19题: [单项选择]Walter offered us a lift when he was leaving the office, but our work ______, we refused the offer. A. not finishing B. had not been finished C. not having finished D. not being finished 参考答案:D 答案解析:[考点] 独立主格结构
[解析] but后面的句子的逻辑主语与主句的主语不一致,已独立存在,所以用独立主格结构。又因为work与finish之间是动宾关系,并且our work作主语,故要用被