Решыте а то у меня плохо с етим

1. (Better) technical maintenance of motor vehicles, upgrading of engine design, use of new types of fuel and lowtoxic additives will help minimize air pollution in cities caused by motor transport.-сравнительная 
2. The end of the 19
th century and the beginning of the 20
th century were marked by sharpest struggle between
the (great) powers.-положительная 
3. Since 1945 atomic weapons have become (much more) -сравнительная powerful and have been stockpiled in large quantities.-
4. (The more) you learn, (the more) you know, (the more) you know, (the more) you forget, (the more) you forget, (the
less) you know. Why study?-сравнительная 
5. Perhaps (the best) place to end a visit to Moscow is the Kalinin Avenue,  ,especially at night, when the lights are
blazing превосходная

Mark: I`ve heard you are a theatre-goer?
David: Yes, I am. I like theatre very much. What is on at Moscow theatres at present? I would like to go somewhere a day after tomorrow.
Mark: There are very many theatres in the capital of Russia. Our Bolshoy Theatre is well known all over the globe. You can see a ballet of hear an opera in this theatre.
David: Where is the Bolshoy Theatre situated?Mark: It is in the centre of our city.
David: I would prefer to go to a drama theatre. What is your most popular drama theatre?
Mark: I think it is the Taganka Theatre. You can see modern and classical plays there. The Taganka Theatre is situated in the centre of our city.
David: I`m fond of drama but I don`t speak Russian. I will not be able to understand the play.
Mark: You can go to the circus. We have two circuses in Moscow. They are really very good and known all over the Earth.David: It is an excellent idea. I like circus and I am sure I will enjoy the performance. Where can I book seats?
Mark: There is always the biggest choice of tickets at the booking-office of the Circus. But I recommend you to book tickets immediately because the day after tomorrow the tickets can be sold out.
David: All right, I will do it now. Thank you for your advice.Mark:  Not at all. I hope you will enjoy the performance.you will enjoy the performance.