问题
选择题
Walter offered us a lift when he was leaving the office, but our work ______, we didn’t accept the offer.
A．not being finished
B．having not been finished
C．had not been finished
D．not having finished
答案
答案：A
题目分析：句意：沃尔特在离开办公室时给了我们一件礼物，但是还没结束，我们就没有接受。 当状语的逻辑主语和句子的主语不一致时，需要用独立主格结构或者从句的形式来表达。这里还有被动的用法。故选A。
考点: 考查独立主格结构的用法。