3 * Choose the correc 1 Over millions of years humans have had to produce/evolve responses to many problems. 2 Doctors don't think there is a simple way to cure/suffer stress disorders. 3 Scientists are always working to identify/serve different chemicals within the body. 4 Some companies are starting to minimise/lower their prices for medication. 5 An overly-demanding work schedule can ensure/ take a heavy toll on your health. 32

1.evolve
2.suffer
3.identify
4.lower
5.take

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.

.1.-open the window.

-but i have opened the window.

2.i have seen the film.

3.he has opened the door.

4.they have cleaned the room.