Submitted by admin on Sat, 05/17/2014 - 20:55
definition:
Landscape underlain by limestone that has been eroded by dissolution, producing ridges, towers, fissures, sinkholes, and other characteristic landforms.
sentence:
The underlying limestone karst topography allows water to flow in abundant underground rivers, feeding the numerous springs, which flow into the many creeks and streams.
difficulty:
medium
toefl frequency:
2
toefl classification: