2 Complete the text with the words in the box. prevent suffer cure research
research development
operation discovery transplant
3
5
Medical ? has changed our lives. Before the ?
of antibiotics in 1928, there was no
for many
when we
common illnesses. Today, we don't 4
have an
because there are anaesthetics. These
days, surgeons can 6 _ many body parts and save
lives. Vaccines are used to ? people getting
some serious illnesses. The 8 of new technology
will help save even more lives in the future.​

1. The solar lamps are lighting the tunnel. The solar lamps were lighting the tunnel. The solar lamps will be lighting the tunnel.
2. The scientist is developing a new source of energy. The scientist was developing a new source of energy. The scientist will be developing a new source of energy.
3. The engineers are working at the problem of using solar power. The engineers were working at the problem of using solar power. The engineers will be working at the problem of using solar power.
4. The people are not using poor methods of research. The people were not using poor methods of research. The people will not be using poor methods of research.
5. The students are not having an interesting discussion. The students were not having an interesting discussion. The students will not be having an interesting discussion.
6. The sun is not shining brightly. The sun was not shining brightly. The sun will not be shining brightly.
7. The workers are complaining about unsafe working conditions. The workers were complaining about unsafe working conditions. The workers will be complaining about unsafe working conditions.
8. The government is trying to protect consumers. The government was trying to protect consumers. The government will be trying to protect consumers.

1. Switch on the light. It (is getting) dark. 2. Put on a warm coat. It (is snowing) outside. 3. Look out of the window. Some students (are hurrying) to their first lecture. 4. It’s a fine day today. The sun (is shining), the wind is not (blowing). 5. We (are having) dinner right now. I’ll call you back later. 6. I (am wearing) my best suit and shoes today. I (am going) to an interview. 7. He (is looking for) this file but he can’t find it. 8. — What are you (looking) at? — I (am looking) at my old photographs. 9. It’s 10 o’clock but the child is still (sleeping). 10. I (am learning) Arabic, and I find it very interesting. 11. They are at a karaoke club now. They (are singing) there. 12. Look how many people (are walking) in the park. They (are enjoying) the fresh air and exercise. 13. What group are you (teaching) this year? 14. — How are you (feeling) today? — Thank you, doctor. I (am feeling) much better. 15. — Are you still (looking) for a job? — Yes, I am. 16. — What are you (thinking) about? — I (am thinking) about you. 17. — Why are you (sitting) here and (doing) nothing? — I (am relaxing). 18.— Are you (kidding)? — No, I’m absolutely serious. 19. — How are you (getting on)? — Thank you, I (am doing) fine.