Complete the sentences with these compound nouns: If you hear the , you have to leave the building. Very few have long acting careers. You have to stop when the are red. When you go to the beach, you should put on . I have to see a dentist. I’ve got . I get cheaper holidays because I work at a . You have to wear a when you are driving. I’ll phone the and book a tennis court.

When I (rang) up my friend, he (was sleeping).When grandfather (was watching) TV, he (fell) asleep.When my friend (came) to see me, I (was doing) my homework.When I (was going) to the stadium, I (met) Kate and Ann.When Nick (rang) me up yesterday, I (was helping) mother.When the children (were walking) through the wood, they (saw) a fox.When I (came) home, my sister (was washing) the floor.When Mike (was playing) in the yard, he (found) a ball.When I (was drawing) yesterday, I (broke) two pencils.When I (met) Tom, he (was going) to the shop.When I (looked) out of the window, the children (were playing) hide-and-seek.I (went) to the theatre yesterday.At seven o'clock yesterday I (went) to the theatre.What you (did) at 5 o'clock yesterday? -I (was playing) the piano.When I (came) to school, the children (were standing) near the classroom.We (were playing) in the yard the whole evening yesterday.When I (was preparing) breakfast in the morning, I (cut) my finger.Last year I (went) to the United States. Did you go to Great Britain last year? - No, I (went) to France.What you (did) yesterday? — I (was translating) a very long article

The world of science doesn't have a bordres. We live in a world where discoveries are make constantly. There are many scientists . For example The great law of gravitation was discovered by Isaac Newtone. Radio was discovered by Alexander  Popov. Russian chemist Mendeleev invented the Periodic Table of Elements in 1869. Every time when scientists make discoveries we understand that we are just a speck in the huge world. The more of discoveries, the more questions. Consequently the world of science doesn't have a borders.