Where is nick? he (go) out of the office. 2. i can’t find my key. i think (lose) it. 3. what are you going to do tonight? you (decide) yet? 4. wait a minute! they (not/finish) their work yet. 5. i miss her. she (not/be) at home for ages. 6. what’s in the newspaper today? (not/read) it yet. 7. i’m looking for bob. where he (go)? 8. she is having her birthday today. she already (invite) us. 9. we are waiting for you. mum already (cook) the dinner. 10. my family is on holiday. they (go) to france. 11. her face is familiar to me but (forget) her name. 12. you ever (be) to scotland? it’s a wonderful country! 13. we are going to the restaurant tonight. he (reserve) the table. 14. it’s good for your health that you (give) up smoking. 15. — do you like caviar? — i don’t know, never (eat) it.

1. Where is Nick? He has just (gone) out of the office.
2. I can’t find my key. I think I have (lost) it.
3. What are you going to do tonight? Have you  (decided) yet?
4. Wait a minute! They have  (not finished) their work yet.
5. I miss her. She has (not been) at home for ages.
6. What’s in the newspaper today? I have (not read) it yet.
7. I’m looking for Bob. Where has he (gone)?
8. She is having her birthday today. She has already  (invited) us.
9. We are waiting for you. Mum has already (cooked) the dinner.
10. My family is on holiday. They have (gone) to France.
11. Her face is familiar to me but I have (forgotten) her name.
12. Have you ever  (been) to Scotland? It’s a wonderful country!
13. We are going to the restaurant tonight. He has (reserved) the table.
14. It’s good for your health that you have  (given) up smoking.
15. — Do you like caviar? — I don’t know, I have never  (eaten) it.

8. The characteristics of a headline are the attraction of another's attention with an ad, which has to help you make a better selection on better prospects, and which also delivers a message.
9. Some articles begin on the front page or continue to the next because an article can't be sometimes fit onto just one page, therefore it is continued on the next page. 

10. I myself enjoy crossword puzzles, for they improve my vocabulary and test my knowledge.

11. The characteristics of a good advertisement is a clear message of what is being advertised, and something that catches possible future customer's attention, like a good design or slogan.

12. People may write letters to the editor to make suggestions, say their opinion on some matter, or just to simply show their commendation.   

Scientific progress is the idea that science increases its problem solving ability through the application of some scientific method.

Several Philosophers of Science have supported arguments that the progress of science is discontinuous. In that case, progress is not a continuous accumulation, but rather a revolutionary process where brand new ideas are adopted and old ideas become abandoned. Thomas Kuhn was a major proponent of this model of scientific progress, as explained in his book The Structure of Scientific Revolutions. 

Technological change (TC) is a term that is used to describe the overall process of invention, innovation and diffusion of technology or processes. The term is synonymous with technological development, technological achievement, and technological progress. In essence TC is the invention of a technology (or a process), the continuous process of improving a technology (in which it often becomes cheaper) and its diffusion throughout industry or society. In short, technological change is based on both better and more technology.