There is _______ “u” and _______ “f” in the word “unfamiliar”.

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 ______ “s” in the word “bus”.

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

There is ________"u" and ________"h" in the word "hour".

There is ______ “u” and ______ “s” in the word “bus”.

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