Даю 15 баллов!!!Раскройте скобки, употребляя требующуюся форму прилагательного:3. As he

Даю 15 баллов!!!
Раскройте скобки, употребляя требующуюся форму прилагательного:
3. As he went on, the box became (heavy) and (heavy).
6. It is autumn. Every day the air becomes (cold), the leaves (yrllow)
Раскройте скобки, употребляя требующуюся форму прилагательного:
1. Russia is a very (large) country.
2. Which is (large): the United States or Canada?
3. What is the name of the (big) port in the United States?
4. Moscow is the (large) city in Russia.
5. The London underground is the (old) in the world.
6. There is a (great) number of cars and duses in the streets of Moscow than city of Russia.
7. St. Petersburg is one of the (beautiful) cities in the world.