A.Because their environment is becoming more and more dirty.B.Because the traditional
专四
已帮助 人
A.Because their environment is becoming more and more dirty.
B.Because the traditional ways of treating wastes are not efficient.
C.Because they are short of useful materials.
D.Because they need new materials made from garbage.
-
正确答案:B
解析:选项和原因有关,本题是因果题。从The traditional way of getting rid of solid wastes is quickly becoming inadequate.可以得知原因是B。
