помогите с английским пожалуйста упр 7

1 where The USA  is
2 what are northern and  southern neighbours of the USA
3 where the country extends from 
4 is the weather same in different places
5 can i  find there ....
6 what are the highest mountains
7 what is the longest river  
8 how much people live  in the US
9 how much states make up the USA
10 what is the capital of the USA
11 what mean the letter D.C
12 what is the largest city in the country?