Вопрос по английскому языку:

Ex.3. Form the comparative or superlative degrees of the adjectives in brackets.
1. Which is (large)_______________: the USA or Canada?
2. Moscow is the (large) _______________city in Russia.
3. The London underground is the (old)______________in the world.
4. St. Petersburg is one of the (beautiful)_____________cities in the world.
5. The rivers in America are much (big) _____________than those in England.
6. What is the name of the (high)_____________mountain in Asia?
7. The English Channel is (wide)_____________than the straits of Gibraltar.
8. The island of Great Britain is (small)______________than Greenland.
9. What is the name of the (big)_____________port in the United States?
10. This fact is (important)_______________than that one.