4 Read the text. Then mark the sentences T (true) or F (false) or DS (doesn't say). 1 MTV didn't exist before August 1981. 2 The first MTV broadcast started at noon. 3 MTV helped the careers of many performers. 4 Beavis and Butthead is a popular music video. 5 MTV is not as popular today as it was in the '90s. 6 Today you can enjoy a variety of programmes on MTV. 7 MTV is 25 years old.