, нужно поставить во времена

1)what are  your brothers doing? -they are playing tennis. - have they done their lessons? 2)he doesn't understand when i speak english. 3)telegram has just been sent. they will receive it in 2 hours. 4)he found the window open, although he had closed it before he left home. 5)there was no english lesson yesterday. 6)will you give me this book if it is interesting? 7)who are you waiting for? - my friend. she will come in 5 minutes. 8)boris took a bath, now he is having a rest. 9)she asked me what color the dress was, white or blue. 10)i met the engineer who told me about the meeting. 11)this article for our wall newspaper is written by peter. peter wrote this article for our wall newspaper. 12)she asked me if there was often or rarely snow in the winter in my region. 13)she asked me if i often watched tv and if i had a favorite tv show. 14)do i have to do exercise 5? 15)i was asked to visit him. he has been ill since monday.