On the map above, country 2 is and country 7 is . A.
China . . . Mongolia
B.
Kazakhstan . . . China
C.
China . . . India
D.
Mongolia . . . China

So the 1st image is a map with the countries you are talking about in the question that is labeled. Let me know if this helps and/or if you need any more help!  :)

Explanation:

Try and use the shapes of the countries on the labeled map to figure out the names of the countries on the unlabeled map