While we are developing agriculture and industry, we must prevent the earth .
A. from polluting
B. polluted
C. polluting
D. being polluted
网友回答
A. from polluting
B. polluted
C. polluting
(答案→)D. being polluted
解析：考查词组：prevent sth from doing,阻止某物做，，，。其中from可以省略。the earth和pollute是被动含义，用动名词的被动，句意：当我们在发展农业和工业的同时，我们必须阻止地球遭到污染。