Sony．Ididn'tansweryourphone,forI

问题详情：

Sony．I didn't answer your phone, for I _ with a trade partner from Tanzania．

       A．negotiated                                           B．was negotiating                          C．had negotiated                                      D．would be negotiated

【回答】

B

知识点：过去进行时及其被动式

题型：选择题