Which is the primary source of revenue for Brunei? 

Name the continent smaller than south America.

Name the temperate grasslands of North America.

Which is the largest producer of Tin in the world? 

Which is the hottest placed on the Earth? 

Name the primitive tribe which is found in the hot desert.

Which river is one of the busiest inland waterways of the world? 

Which is the only planet in our solar system that supports life? 

Which one of the following is known as the cold desert?