yourletter,Iwouldhavesetofftwodaysago.A．HadIreceiv...

问题详情：

      your letter, I would have set off two days ago.

A．Had I received                                     B．Should I received

C．If; could have received                         D．If I received

【回答】

A

知识点：虚拟语气

题型：选择题