Помогите пожалуйста!!!

Level 1
1) Was she standing alone before the fire? She wasn't standing alone before the fire
2) Were they talking about our party? They weren"t talking about our party
3) Was she playing the piano when you came in? She wasn't playing the piano when you came in
4) Were the children doing their homework at 6 o'clock yesterday? The children weren't doing their homework at 6 o'clock yesterday
5) Were the children swimming in the river the whole evening yesterday? The children weren't swimming in the river the whole evening yesterday

Level 2
1) The man was standing near the door
2) Tom was telling an interesting story
3) The children were swimming in the river
4) Was Mary wearing a white dress? 
5) She was going to the cinema
6) They weren't working in the garden
7) We were not sitting by the window
8) The workers were building a bridge
9. The girl was buying a new dress
10) The old man was speaking in low voice

Level 3
1) I am writing an English excercise
2) I was writing an excercise at this time yesterday
3) I wrote an English excercise yesterday
4) My little sister is sleeping now
5) My little sister was sleeping at this time yesterday
6) My friends weren't doing their homework at 7 o'clock yesterday. They were playing volley ball
7) He got up at 7 o'clock yesterday
8) She was washing the floor at 4 o'clock yesterday
9) I was eating ice-cream when you rang up yesterday
10) Were you eating ice-cream at that time yesterday?
11) What is your father doing now?
12) Did you see this film last week?