Задания в картинке помагите пожалуста

1 He can't walk very fast because he has hurt a leg. 2.I can't get in because I have lost a key. 3.I know this story very well because I have seen the film. 4. ...because I haven't put a stamp on it. 5. ...because he hasn't eaten too much. 6. ...because they haven't saved money. 7. ...because I have met him before. 8. ...because we haven't heard from him. 9. ...because he has given up smokimg.  10. ...because he has locked the door.