She is a girl, but she can walk home by herself.
- A.two year old
- B.two years old
- C.two-years-old
- D.two-year-old
答案
正确答案:D
知识点:复合形容词

复合形容词“基数词-计量单位词(单数)-形容词(long/wide/high/deep/old)”在句子中可以作定语。在此题中,空格处需要填一个定语来修饰“girl”,所以正确答案为D。注意“two years old”在句子中可以作表语,不能作定语。

略
