Question

"Walter offered us a lift when he was leaving the office, but our work ________, "

"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 finished"

Answer 1

答案D
考查非谓语动词中独立主格结构的用法。根据句子的意思，Walter下班后主动提出让我们搭车，但是我们因为尚未完成工作，拒绝了他的好意。our work与finish是被动关系，所以排除A和C两项，连词but连接的句子是we refused the offer，因此使用非谓语形式作状语，故排除B项。
参考：http://www.zuoyebao.com/q/25079