问题描述：
-----Do you know the boy ___ is sitting next to peter.
---Do you know the boy ___ is sitting next to peter.
---Yes.He is Peter's friend.They are celebrating his ___ birthday.
A.who；ninth B.that；nineth
C./；nineth D.which；ninth
---Do you know the boy ___ is sitting next to peter.
---Yes.He is Peter's friend.They are celebrating his ___ birthday.
A.who；ninth B.that；nineth
C./；nineth D.which；ninth
问题解答：
我来补答展开全文阅读