In organic farming, natural waste from animals are made use of the fields.
A. fertilizing
B. to fertilize
C. in fertilizing
D. to fertilized
网友回答
A. fertilizing
(答案→)B. to fertilize
C. in fertilizing
D. to fertilized
解析： 考查短语：make use of sth to do 利用什么做某事，被动形式为sth be made use of to do ,某物被用来做某事，句意：在有机耕种中，动物的天然粪便被用来给田地施肥。所以选B。