—HasMr．Gilbertcompletedthereport?  —Idon’tknow．ButIsawh...

问题详情：

—Has Mr．Gilbert completed the report?

   —I don’t know．But I saw he ______ it．  

    A．wrote    B．has been writing  C．was writing  D．had written

【回答】

C

知识点：过去进行时及其被动式

题型：选择题