The Great Wall winds its way from west to east, _______ deserts, _______mountains and ________valleys, until at last it reaches the sea.

A. across; through; over          B. through; on; across

C. across; along; up              D. across; over; through

The Great Wall winds its way _________ high mountains, _________ deep valleys and _________ great deserts．

1. A.
   on, across, through
2. B.
   over, through, through
3. C.
   over, through, across
4. D.
   on, in, across

The Great Wall winds its way ____high mountains, ___ deep valleys and ___ great deserts.    A. on, across, through  B. over, through, through  C. over, through, across D. on, in, across

The Great Wall winds its way ____high mountains, ___ deep valleys and ___ great deserts.　 A. on, across, through B. over, through, through C. over, through, across D. on, in, across

The Great Wall winds its way      mountains     valleys and      deserts to the east.

A.over, in, through        B.over, through, across  

C.on, in, across           D.in, in, through