his friend name is peter 哪里错了 john is fourteen years old her birthday is july twenty1.his friend name is peter2. .2 john is fourteen years old. 3her birthday is july twenty 4 what is mary birthday?it is October 1st5. we have art festival each year 下列各句中 有一处错误 并指出并改正
问题描述：
his friend name is peter 哪里错了 john is fourteen years old her birthday is july twenty
1.his friend name is peter2.
.2 john is fourteen years old
. 3her birthday is july twenty
4 what is mary birthday?
it is October 1st
5. we have art festival each year 下列各句中 有一处错误 并指出并改正
答
1.his friend's name is peter
2 john is fourteen years old // 这句没找到错误
3her birthday is july twentith
4 what is mary's birthday？
it is October 1st
5. we have art festival every year
答
4 what is mary birthday？
这里有错误，问别人生日时，一般使用when，即：
when is mary birthday?
答
his friend's name is peter
john is fourteen-years old
her birthday is july the twentith
when is mary's birthday
we have art fesitival every year.