一Istillcannotfigureoutwhyhemissedhisflight．一He       an...

问题详情：

一I still cannot figure out why he missed his flight．

一He        an accident on the way to the airport．

A．could have had      B．should have had       C．would have had     D．must have had

【回答】

A

知识点：虚拟语气

题型：选择题