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Все предложения нужно переделать в определенное время, можно просто кючами написать

1 fed2 what were you doing- was feeding3 did your brother do-played4 began5 was cooking6 were you doing-came 7 Were you having 8 he didn't go 9 went to bed10 was sleeping11 were playing-started12 saw-was crossing13 began14 was repairing 15 finished16 we were playing17 didn't go- was writing18 When did you father come-came19 came-was making 20 didn't go