There is __________ “u” and __________ “n” in the word “unhappy”.

A. a；an                    B. an；a               C. a；a                     D. an；an

There is __________“u”and__________“n”in the word“run”．

A．a，a                       B．an，an                    C．an，a                    D．a，an

There is ________ "a" and ________ "n" in the word "fan".

1. A.
   an; an
2. B.
   an; a
3. C.
   a; an
4. D.
   a; a