题目
(单选题 2分) At the present rate, approximately how many years later the black top soil now covering the Midwest will completely be blown or washed away?A. 50 years later.B. 80 years later.C. 100 years later.D. 120 years later.
(单选题 2分) At the present rate, approximately how many years later the black top soil now covering the Midwest will completely be blown or washed away?
A. 50 years later.
B. 80 years later.
C. 100 years later.
D. 120 years later.
题目解答
答案
B. 80 years later.