改错，下列句子均有一处错误，找出来，将正确的句子写在横线上。1. It's a old, old story.
_________________________________________________________
2. There are two pair of skates.
_________________________________________________________
3. Danny walk to school every day.
_________________________________________________________
4. These are my boot.
_________________________________________________________
试题答案
1. It's an old, old story.
2. There are two pairs of skates.
3. Danny walks to school every day.
4. These are my boots.