In order to prevent the disease to other districts, the authorized organization killed thousands and thousands of cows.
A. extending
B. spreading
C. expanding
D. stretching
网友回答
A. extending
(答案→)B. spreading
C. expanding
D. stretching
解析：词义辨析。A. 延伸；扩大 B. 传播；伸展 C.扩张；展开 D. 伸展；张开。句意：为了阻止这种疾病传播到其它区域，被授权的阻止杀死了成千上万的牛。故选B。