Ответ:
1задание
the smallest, the widest, the strongest, the healthiest, the happiest, very convenient, most dangerous, the most popular, the most reliable, the most wonderful
2 задание
1.train 2.silver 3.village 4.Ocean 5.hotel 6.winter 7. July 8. Arbat 9. Nastya
3 задание
the cat is smaller than the tiger
a child younger than a student
one city is bigger than the other
skyscraper above the house
German is more difficult than English
dead colder than June
a week shorter than a month
the book is much more interesting than the movie
the weather in London is worse than in Rome
fruits are healthier than sweets
4 задание
Kirov is quiet. Ustyug is quieter. The village is the quietest.
Istanbul is a populated city. Moscow is more populated. London is the most populous.
windy weather is good. Rainy is best. Warm weather is the nicest.
The river is deep. The lake is deeper. The ocean is deepest.
Spain is a large country. The USA is larger. Russia is the largest country.
Danube is a long river. The Nile is longer. The Thames is the longest river.
Prague is a modern city. Los Angeles is more modern. London is the most modern.
the hour is short. The minutes are even shorter. The second is the shortest.