Some of the following sentences contain mistakes. Find the mistakes and correct them.

15. Some of the following sentences contain mistakes. Find the mistakes and correct them.

1. While they were carrying out tests in the laboratories, researchers were analysing past results.

2. The Romans built roads of layers of broken stones of various sizes and were covering them with flat stones.

3. Louis Pasteur was discovering the action of germs while he was studying fermentation in wines.

4. While we were studying the airbags, we made a significant discovery.

5. While our team was studying performance of the car, another team looked at the characteristics.

6. She was steering the boat while he was sleeping.

7. I repaired my motorbike at 3 o’clock yesterday.

 

16. Put the verbs in brackets into the Past Continuous or the Past Simple.

A: Steve 0) had (to have) an accident yesterday. He 1) ..… (to drive) his car when a bird 2) ..… (to fly) into the windscreen. He 3) .…. (to try) to stop quickly but he 4) ….. (to crash) into a wall.

B: Last week, I 1) ….. (to go) to visit a famous scientist. He 2) ….. (to talk) about his new book when I 3) ….. (to arrive). He 4) ….. (to give) such an interesting talk that I 5) ….. (to be) disappointed when it 6) ….. (to end).

 

17. Translate the following sentences into English.

1. Ви дивились телевізійну програму про забруднення навколишнього середовища о 9 годині вчора?

2. Що вона робила, коли ви прийшли до лабораторії? - Вона проводила експеримент.

3. Я подивився телевізійну передачу про проблему переробки відходів, прочитав в бібліотеці цікаву інформацію про нові методи утилізації та потім написав статтю.

4. В той час як ми створювали класифікацію хімікатів, вони записували результати.

5. Чоловік готував доповідь, коли хтось постукав у двері.

6. Де ти був о 3 годині? - Я ремонтував велосипед.

7. Вчора вона цілий день готувалась до екзамену з англійської мови.