Помогите с английским пж

1. Which is larger : the United States  or Canada?
2.What is the name of the biggest port in the United States?
3. Moscow is the largest city in Russia.
4. The London underground is the oldest in the world.
5. There is a greater numbers of cars  and buses in the streets of Moscow than in any  other city of Russia.
6. The rivers in America are bigger than  those in England.
8. The island of Great  Britain is smaller  than Greenland.
9. What is the name of the highest  mountain in Asia?
10. The English Channel is wider than the straits of Gibraltar.

1.larger
2.biggest
3.largest
4.oldest
5.greater
6.bigger
8.smaller
9.highest
10.wider