Вставьте слова подходящие по смыслу !! 12. Be careful with the knife or you'll cut .
13.it's ... cold to play in the garden.
14. You'll... amazed by the scenery.
15. You aren't... to smoke in here.
16. You must stay... from people you don't know well.
17. ... play 1 matches.
18. Don't... tour children go swimming alone.
19. You... cover electrical sockets when they are not in use.