Submitted by admin on Mon, 04/21/2014 - 23:46
definition:
A mixture of dark bituminous pitch with sand or gravel, used for surfacing roads, flooring, roofing, etc..
sentence:
Green floor tiles in the kids' bathroom are made of waste products derived from gravel, asphalt, and cement
difficulty:
medium
toefl frequency:
2
toefl classification: