Помогите плиз с прошедшим временем даю 60 баллов,задания в фото

1 had been crying 2 came,had,helped 3 didn't work 4 were having 5 got 6 had finished -rang 7 wasn't reading 8 had been preparing 9 had snowed(had been snowing) 10 had arrived-phoned 11 was washing(had washed)-came 12 saw-was thinking 13 was sitting-was-had been running 14 did you go 15 invented 16 what was he doing when you found 17 came,opened,had bought ,began 18 had done,were 19 didn't know 20 when was Pushkin born ?