Question

Our English teacher is a ________ woman.

1. A.
   22-years-old
2. B.
   22-year-old
3. C.
   twenty-two years old
4. D.
   twenty year old

Answer 1

B
点拨：此题考查合成形容词作定语。其中名词要用单数形式，并且用连字符连接。如果放在单词后面，就不用连字符，要用复数形式，如an article of two thousand words (一篇2千字的文章)。