_________（49）A.Therefore strict measures must be

_________（49）

A.Therefore strict measures must be taken

B.They give the earth oxygen,and are the home for half of the world’s animals and plants

C.Because of a growing population

D.Unfortunately,these rainforests are in danger

E.Tropical rainforests are home to tribal peoples who rely on their surroundings for food,shelter,and medicines

F. They are divided into four different areas