Question

Sun Tiantian , _______ , is a professional tennis player from Zhengzhou.

1. A.
   a eighteen years old girl
2. B.
   an eighteen-year-old girl
3. C.
   an eighteen years old girl
4. D.
   a eighteen-year-old girl

Answer 1

B
本题需要的是第一个元音音标为an，而eighteen-year-old作为定语，故选答案为B