Complete the sentences choosing the right form of the verb to be

Complete the sentences choosing the right form of the verb to be (has been,have been,had been).1) I am absolutely sure that a lot of recent programmes… devoted to the globalproblems of our time.2) The teacher explained to us that the BBC … formed in Britain according to the monarch's order.3) Lately a lot of old feature films … shown on "Culture"channel.4) A new remake of my favourite cartoon … just … shown on TV.5) They said the books … published several years before.6) This TV programmes … introduced lately.I haven't seen it yet.7) Such video clips … never … enjoyed by old people.8) This concert … just … recorded.Now my parents can listen to it.9) Alice said the books … not … bought yet.We can't find the shop where they are sold.10) They told us the new school … built in our street.