帮你回答补充问题：1 The boy who is four years old goes to school every day. 2 She is the girl who we are looking for. 3 This is the computer which my uncle sent me last year.
帮你回答补充问题：1 The boy who is four years old goes to school every day. 2 She is the girl who we are looking for. 3 This is the computer which my uncle sent me last year.