(单选题)

—Did you listen to his amusing lecture?
—I wish I had, but I ______ on my paper that should have been finished earlier.

A.worked

B.was working

C.had worked

D.have worked

参考答案：B

参考解析：

考查过去进行时。句意：“你听他那个有趣的演讲了吗？”“我多希望我听了，但是我那会儿正在写论文，其实论文本该早些完成的。”表达的是演讲开始的时候，我正在写论文，表示过去进行时。故选B。

知识点：

—Did you listen to his amusing lecture?—I wish I had, but I ______ on my paper that should have been finished earlier.