Question

There is ______ boy in the corner.

1. A.
   a 11 years old
2. B.
   a 11-year- old
3. C.
   an 11-years- old
4. D.
   an 11-year-old

Answer 1

D
本题缺修饰boy作定语的形容词，而合成形容词中的名词应用原形，即11-year-old；11（eleven）是以原音开头的词，其前应用冠词an，故选D。