The Nile River, the Colorado River, but(A) the Yellow Riverflow through(B) deserts to deliver(C) their sediments to the sea.(D)   

___ hard  I have tried, I could not keep pace with Tony.  

 I am afraid that the company is in deep trouble. ________, we are going to make some people redundant.  

The Simpson Desert was named _______ Mr. Simpson, President of the South Australian Branch of the Royal Geographical Society of Australia. 

Mrs. Lindon has ________ that she is unable to get a job. 

 ________ is the process by which a piece of land becomes dry, empty, and unsuitable for growing trees or crops on.

The ________ of a cliff, or mountain, is a vertical surface or side of it

Camels have one or two humps used ________ storing water and food.