Past Continuous, Present Perfect, Present Perfect Continuous, Past Perfect.
1. What are you doing at the moment? - I am listening
(to listen) to music.
2. I will tell her all I know about nuclear power stations if she
(to ask) asks me
3. When did the war start
(to start)? - In 1941.
4. Chris was writing a letter when suddenly the telephone rang
(to ring).
5. He has been learning
(to learn) English for 5 years.
6. She didn't know
(not to know) anything about healthy living last year.
7. If the weather changes tomorrow. We will go
(to go) to the country.
8. He has had
(to have) this car for two years already
9. Jane asked where they had they been
(te be) all that time.
10. When Tony returned home, John and Nick were still talking
(to talk) to their friend,
11. I usually do
(to do) different projects on Sundays.
12. We weren't playing
(not to play) football for 3 hours yesterday.
13. What are her plans? She is moving
(to move) into a new flat.
14. While Dan was watching
(to watch) TV. his brother was doing homework.
15. They haven't finished
(not to finish) the test yet.
1)
1. Design and construction of roads, bridges, buildings - civil engineering
2. Science of very low temperatures - cryogenics
3. Science of communication and control in machines and brain - cybernetics
4. Study of work environments and conditions - ergonomics
5. Scientific study of the chemical nature and natural forces influencing stars - astrophysics
6. Study of the influence of a country’s position on its politics - geopolitics
7. Scientific study of space travel - astronautics
8. Scientific study of human races and their characteristics - ethnology
2)
1. machine
2. appliances
3. machinery
4. device
5. gadgets
6. motor
