Раскройте скобки, употребляя требующуюся форму прилагательного:1. Which is (large): the USA

Раскройте скобки, употребляя требующуюся форму прилагательного:
1. Which is (large): the USA or Canada?
2. St.Petersburg is one of the (beautiful) cities in the world.
3. What is the (high) mountain in Asia?
4. This nice-looking girl is the (good) student in our group.
5. Chinese is (difficult) than English. 6.My sister speaks English (bad) than I do.
6. The Volga is (short) than the Mississippi.
7. Which is the (beautiful) place in this part of the country?
8. This boy is the (bad) student in our group.
9. January is the (cold) month of the year.
10. Your handwriting is (good) than it was last year.
11. A train is (comfortable) than a bus.