ПОМОГИТЕ ЗДЕЛАТЬ

out . She ( to burn ) herself . 2 . The boy ( to hurt ) himself while he ( to skate ) . 3 . When the woman ( to enter ) the room , the children ( to feed ) the goldfish . 4 . When i ( to visit ) my friends in Denmark . I ( to buy ) two presents for my family . 5 . When it ( to start ) to rain , we ( to bathe ) in the river . 6 . Yesterday at one o'clock I ( to have ) lunch at the canteen . 7 . When he ( to come ) in , I ( to do ) my exercises . 8 . What you ( to do ) at eight o'clock yesterday ? 9 . At this time yesterday I ( to go ) home . 10 . You ( to sleep ) when I ( to go ) out . 11 . He ( to read ) on the sofa when I ( to come ) in and ( to sit ) down beside him . 12 . I ( to walk ) along the street with my friend when a tram ( to pass ) . 13 . She ( to look ) out of the window when I ( to see ) her . 14 . We ( to answer ) the teacher's questions when the headmistress ( to enter ) the classroom . 15 . They ( to drink ) tea when I ( to come ) home . 16 . He ( to walk ) along the river when a boat ( pass ) . 17 . The old man ( to think ) about his plan when he ( to fall ) asleep . 18 . We ( to listen ) to an interesting lecture yesterday . 19 . When I ( to enter ) the classroom , the teacher ( to write ) words on the blackboard and the pupils ( to copy ) them into their exercise books . 20 . They ( to get ) ready to go out when it ( to begin ) raining .