保证准确!
1. The dumplings (which/that) my mother makes are delicious.
2. The person who is sitting before you is the very person (whom) you saw yesterday.
3. The girl (who/whom) I saw yesterday is Mary.
4. The person is the one who sang at the party.
5. I love the girl who wears her hair long.
6. The boy whose mother is a teacher is Tom.
7. The photographer/cameraman who is taking pitures/photos is his father.
8. The day when his mother bought him a present is his birthday.
或:The day when his mother bought a present for him is his birthday.
另:when可以换写成on which.
注:/ 表示可以任意选用其一;( )表示可以省略。
参考资料:英语牛人团团员