Lesson 19. № 4. ГДЗ Английский язык 4 класс Верещагина. Помогите раскрыть скобки!

Do you want to know what happened to Robert yesterday? If yes, open the brackets.
 
Robert always (to lеavе) his keys in the hall but yesterday he
(can, cannot) see them anywhere. Robert didn’t (to lock) the
door and (to leave) the house. He (to meet) John in the street
and (to join) him. He told John about the keys. John (to laugh)
a lot and then he (to shout), “Look! Your keys are in your
pocket.”