11. Where (is) your brother? He has just (to come) home. He (is taking) a shower in the bathroom now. 12. As soon as I (saw) him, I (understood) that he (was working) hard. He (was writing) something and (did not notice) anything. 13. When I (came) home yesterday, the children (were running) and (singing) merrily. "We (have learnt) a new song!" they cried. 14. When the young man (entered) the room, she (looked) at him in surprise. What are you (going) to tell me? she (said) . Why have you (come)?
1. Economists are interested in the problems of factors that affect prices of goods and services and necessary recourses to produce them, as well as sellers' and buyers' behaviour in the market and the relationship between "price system" and "market mechanism" 2. Three main approaches to economics are microeconomics, macroeconomics, and development economics. 3. Specialized areas of economics are money economics, international economics, labour economics, industrial economics, agricultural economics, growth economics, mathematical economics, etc. 4. Economists use economic models to understand economic problems and make correct predictions 5. It is not possible to include all the details in a model because real life is complex and a model is an abstraction from real life. 6. A model usually include essential elements and relationships of a particular economic situation 7. An economists choose the model that predicts the results of a particular phenomenon more accurately 8. It is necessary to collect and study actual data in order to know how accurate a model is
1 The verdict is still being discussed by the jury.
2 The evidence on the case is still being collected by the investigator.
3 The suspect has just been arrested by the police inspector.
4 The trial had been closed by the judge by the time we came to the court.
5 The textbook on civil law will have been published by January.
6 A lot of interesting English books will have been translated by December. Some of them have been published already.