. He used to walk a pet dog. （改为否定句）
He _______ _______ _______ walk a pet dog .
Jackie Chan is very handsome.（改为感叹句）
_______ _______ Jackie Chan is!
. I was making model planes when my mother came back. （对画线部分提问）
_______ _______ _______ _______ when your mother came back?
Tom wasn’t old enough to go to school. (同义句转换)
He was _______ _______ _______ go to school.