英语.用适当的关系词填写.

英语.用适当的关系词填写.
Have you met the teacher about ___ he was talking?
No one knows the girl ____ is in a red dress.Maybe she is a new sutdent.
He said he had never been to ther island ___ ehere were many dangerous animals.
Whould you please tell the man ___ car stops in the way to drive his car away?
The boy can carry the box ____ is emoty.