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

A. stretches   B. spreads   C.extends   D. expands

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

A. stretches                   B. spreads                     C.extends                     D. expands

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

A. stretches　　　　 B. spreads　　　 C. extends　　　 D. expands

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

1. A.
   stretches
2. B.
   spreads
3. C.
   extends
4. D.
   expands

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

A. stretches　　 　 B. expands　　 　　　 C. extends　　 　　 D. spreads