called the Pantelograph. Caselli was the first person to send a picture over wires. By the 1880s,
Alexander Graham Bell invented a machine that transmitted pictures and sound over wires. His machine
was called the Photophone. The World’s Fair was held in Paris, France, in the ye
At the beginning of TV history, there were several types of TV technology. One system was a mechanical
model based on a rotating disc. (Rotating discs are discs that spin like CDs.) The other system was an
electronic model. In 1906, Boris Rosing built the first working mechanical TV in Russia. In the 1920s, John
Logie Baird in England and Charles Francis Jenkins in the United States demonstrated improved
mechanical systems. Philo Taylor Farnsworth also showed an electronic system in San Francisco in 1927.
y’s TV, which is an electronic system based on his ideas. Now TV is
everywhere. Before 1947, there were only a few thousand televisions in the U.S. By the 1990s, there
1. (21). 13. The budget commitee decided______this meeting.
2. (22). 39. Because of the flu many teachers were absent_______ work.
3. (23). If I … as clever as you were at those times, I … university.
Were/would have entered
4. (24). I wish, I … a car now, I … to work by bus then.
Had/ wouldn`t go
5. (25). 47. . The teacher got tired______hearing the same old ex-cuses.
Of
6. (26). Choose the answer which correctly completes the sentence. When she tried to explain her
intention, she cut her ... saying it was not to the point.
shortly
7. (27). Choose the answer which correctly completes the sentence. Doston, as well as his two elder
brothers, ... a good full time job.
have
8. (28). Choose the answer which correctly completes the sentence. People use ... gestures and words
to express their ideas and feelings.
both of
9. (29). Choose the answer which correctly completes the sentence. Nothing will make them ... their
mind.
changing
10. (30). Choose the correct answer. - When did you leave school? - ... I was sixteen.
When
11. (31). Choose the correct answer. I ... smoking because I became breathless just walking stairs.
had to stop
12. (32). Choose the suitable modal verb. He spoke so quickly that I ... understand him at all.
couldn’t
13. (33). Choose the answer which correctly completes the sentence. The kettle will switch ... off when
it has boiled.
itself
14. (34). 'I'm
seeing Dr Evans next week.' 'That … be right. He's on holiday then.
May
15. (35). They haven’t worked very much. They … be very tired out.
Can`t
16. (36). Pupils, let’s start the lesson, if you … ready.
Are
17. (37). If I … you, I … at home today, I … somewhere, because the weather is fine.
were/ wouldn’t stay/ would go
18. (38). A: Would you like me to give Mike a message for you? B: Oh,
I don’t want to trouble you. A: It’s
no trouble, really. I ______ Mike tomorrow anyway.
would see
19. (39). Helicopters are very different from airplanes. They can do three things that airplanes cannot
do. First, when airplanes move upward, they must also move forward, but helicopters can move straight
up without moving ahead. Second, helicopters can fly backward, which airplanes cannot do. Third,
helicopters can use their rotors to hover in the air (stay in one place) which is impossible for planes.
Because helicopters can perform actions that airplanes cannot, they are used for different tasks. Since
helicopters can take off without moving forward, they do not need a runway for takeoff. They are used
in congestedareas where there is no room for airplanes or in isolated areas which do not have airports.
Because they can hover, they are used on firefighting missions to drop water on fires. They are used in
logging operations to lift trees out of forests. Helicopters are used as air ambulances to airlift patients
out of situations which are difficult to reach by conventional ambulances. The police use helicopters to
follow suspects on the ground or to search for cars on the ground. Of course, helicopters have military
uses because of their design and capabili
ties. Conventional means…?
