_____ good time we are having!

1. A.
   What
2. B.
   What a
3. C.
   How
4. D.
   How a

_____ good time we are having!

A. What    B.What a    C.How     D.How a

_____ good time we are having!

_____ good time we are having!

A．What             B．What a            C．How              D．How a