1.The Petersons have a very vigorous daughter.She is always running and jumping.
2.In the book,the author reminded the world that unless sth were done,many of the great animals of the African plain and jungle would soon become extinct.
3.These national parks are very important for preserving many animals,who would otherwise run the eist of becoming extinct.
4.Scientists believe that color blindness is an inherited defect,and there is no cure for it.
5.The child was abandoned in the forest,where he was at the mercy of wild beasts.