a) 1. Britain in the 1980s and early 1990s, had a large road building programme.
had - Active voice/ активный залог простое
2. It is not surprising that the car is becoming increasingly popular.
is not surprising - Active voice/ активный залог - Present Simple/настоящее простое
б) 1. Trams were first used in London in 1861, but they were all replaced by bus after 1945.
were used , were replaced - Passive voice/страдательный залог простое
2. Britain, because it is an island, has always been forced to have good trading relations with other countries.
is an island - Active voice/ активный залог - Present Simple/настоящее простое
has been forced - Passive voice/страдательный залог - Present Perfect /Настоящее Совершенное
Выделено капсом:
When he phoned his friends, they WERE WALKING in the garden.
2. My mother WAS COOKING dinner at 6 pm yesterday.
3. The children WERE PLAYING on the playground when it suddenly began to rain.
4. I WAS PLAYING the piano when he came home.
5. We WEREN'T CYCLING all morning yesterday.
6. While Bill WAS WORKING in his office, his friends WERE SWIMMING in the pool.
7. Mary tried to tell him the truth but he WASN'T LISTENING.
8. What WERE you DOING at 8 o’clock last night?
9. My grandfather WAS SITTING in the park all evening.
10. WAS Alice STUDYING English yesterday at 4:00 pm?
1) Many foreign tourists are traveling in our country at present.
2) A person with a good education usually gets a better job.
3) The train is late because the workers are repairing the track.
4) As a rule the workers repair the track in summer.
5) Look! Two aircrafts are flying in the dark sky.
6) This fast train always arrives on schedule.
7) This section of track needs reconstruction.
7) The problem of ecology is becoming one of the most important problems for mankind now.
8) Englishmen very seldom talk on the Underground. They prefer to read newspapers.
9) My TV set works (is working) better now because we have installed the external antenna.
10) I can’t talk to you because I am hurrying.
11) The phone is ringing. Can you answer it?
12) The arrow of compass always points to the North.
13) Nowadays the railways in the USA transport only 0.6 per cent of passengers.
14) Are all these passengers waiting for the suburban train arrival?
15) Do you often receive letters from your former group-mates?
16) What are you looking for]? – I am looking for my umbrella. Look out of the window, it's raining cats and dogs.
17) Does he usually buy one way or round trip tickets?
18) What berth do you prefer to travel by?
19) Where is John? – He is meeting his friends at the airport.
20) What platform does our train depart from?
21) Please, don’t make much noise. The students are writing a test.
Объяснение:
№9 - зависит от контекста.
My TV set works better now - Работает лучше вообще, каждый день, постоянно... потому что установили внешнюю антенну.
My TV set is working better now - Работает прямо сейчас, вот мы его сейчас смотрим и он работает лучше... потому что установили внешнюю антенну.