一I still cannot figure out why he missed his flight．
一He       an accident on the way to the airport．

1. A.
   could have had
2. B.
   should have had
3. C.
   would haye had
4. D.
   must have had

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 haye had                D．must have had

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

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