一Istillcannotfigureoutwhyhemissedhisflight．一He       an...

問題詳情：

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

知識點：虛擬語氣

題型：選擇題