Compared with other animals, snakes are believed to be below in intelligence.
A. average
B. mon
C. ordinary
D. usual
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(答案→)A. average
B. mon
C. ordinary
D. usual
解析:A. average普通的,平均的,B. mon常见的,共同的,C. ordinary平凡的,D. usual通常的,句意:和其他动物相比,蛇在智力上被认为是低于平均数。选A。