с английского .Нужно поставить слова в нужной форме и объяснить почему выбрали именно эту форму

1. We often visit our friends. We don't often visit our friends.
2. My sister usually reads English books  on Saturdays. My sister doesn't usually read English books  on Saturdays.
3.I always  answer or letters. I don't always  answer or letters.
4. Our teaher speaks English very well. Our teaher doesn't speak English very well. 
5. This doctor works in a big factory. This doctor doesn't work in a big factory. 
6. Mary and I live in the nice, big house. Mary and I live don't live in the nice, big house.
7. Our children often go for a walk to that park. Our children don't often go for a walk to that park. 
8. Ann and Nick work at the same factory. Ann and Nick don't work at the same factory. 
9. Her elder son comes home from school at 2 o'clock. Her elder son doesn't come home from school at 2 o'clock. 
10. They often borrow books from the public library. They don't often borrow books from the public library. 
11.George as a rule stays at university till 7 o'clock in the evening. George as a rule doesn't stay at university till 7 o'clock in the evening. 
12. At eleven o'clock my parents listen to the news on the radio and they go to bed. At eleven o'clock my parents don't listen to the news on the radio and they don't go to bed.

Actual problems for advanced age, connected with an output on pension. The person about whom I shall write, always to me was dear. It my father. Now to it of 69 years and it lives in small suburb of New York. My father worked in the company engaged as communications the engineer the electronician. It was well paid work for which it kept up to an output on pension. It found constant test, the work demanding courage that did its happy in the work. It always was very exacting person and did not allow anything to do? Carelessly?. This rule also extended and for its house life. It was the creative person and spent a lot of free time, developing and improving various mechanisms for the work. Actually, it is possible to tell, that it never allowed to have a rest and relax to itself(himself). It spoke, that the TV is the greatest heap of the stuff ever invented. It considered, that the TV prevents to expand to people of their knowledge. It also did not approve those who spent time and money all for nothing? Spending on drink them? In a local tavern or? пропыхивая them? With сигаретным a smoke. Once it has told:? Not too it is a lot of in a life of time carelessly to be scattered by it?. It definitely was the person created for work, almost as the machine which never stops.
From the moment of an output on pension the person is in the period of indemnification. It? The period when the main tasks of an adult life have been finished or postponed. The last human life defines, how much easily it will pass this stage and as it can well adapt to a new life. Age of indemnification? This time when the person reaps the award for that life which it conducted earlier. Gerentology? A science studying process of ageing. Geriatrics? Medical specialization of gerentology the Word gerentology concerns to biology which studies process of ageing from the physiological, pathological, psychological, sociological and economic point of view.
Geriatrics- It is medical specialization of gerentology which studies changes of a human body. The father has provided the wife and two children new enough, the average sizes, with eight rooms the house, settled down in pleasant sleeping area. Its wife worked earlier the school teacher, easily enough established good relations with associates and was simply pleasant woman. In the house never was also a hint on quarrels. However, as in each housekeeping, there were some disagreements usually resolved by a finding of the compromise. They well cooperated together, and it seemed, that they supplemented each other. To my brother and me always consulted concerning something important. There was an impression, that our decisions, were weighed the same as also decisions of our parents, but certainly we knew, that it not so. Our family spent a lot of time together and was rather happy.