The number of the red-crowned cranes will become ____ if we don’t take any actio

题型：不详难度：来源：

The number of the red-crowned cranes will become ____ if we don’t take any action.

A．fewer and fewer

B．less and less

C．smaller and smaller

D．larger and larger

答案

C

解析

形容词的比较级用and来连接表示越来越怎样，根据语境可知丹顶鹤的数量会越来越少，如果人类不采取措施的话。