There is a mistake in each sentence. correct the mistakes. 1. actors may learn a lot of dialogues by heart. 2. your glass is empty. must i refill it? 3. would i introduce mr. brown to you? 4. my sister can to play a few musical instruments. 5. some years ago i didn’t can speak english.

1. actors must learn a lot of dialogues by heart.2. your glass is empty. shall i refill it? 3. may i introduce mr. brown to you? 4. my sister can   play a few musical instruments.5. some years ago i couldn't speak english.

In the 1970s new tv technologies were  developed. a lot of tv programmes are devoted to politics. in the future new tv stations will be built in russia. i am sure the best tv films will be shown next year. television is used for many purposes. the is known as the best non-commercial television system. television signal is sent from a central source and received by home tv sets. more and more people will be touch with the help of television in the future. our lives will be dominated by television in the future. we hope that more good films are watched by young people.