1. No, it isn't. The Ob is longer than the Oka.
2.No, it isn't. Russia is bigger than England.
3.Yes, they are. The days in autumn are as short as in spring.
4. No, it isn't. Moscow is older than St. Peterburg.
5. No, it isn't. The Atlantic ocean is smaller than The Pacific ocean.
6. No, it isn't. The Black sea is colder than the Caspian sea.
7. No, it isn't. Winter in Moscow is warmer than in Tomsk.