As civilization more and more people have realized the importance of preserving rare anim

问题补充：

As civilization, more and more people have realized the importance of preserving rare animals from extinction.

A. stretches

B. spreads

C. extends

D. expands

答案：

A. stretches

(答案→)B. spreads

C. extends

D. expands

解析：spreads “传播，扩散”。A“伸展”；C“延长”；D“膨胀，扩大”。