The world has gotrainforests which cover 7% of the earth's surface.They grow around the earth'sequator in South America,Central America,Africa,Southeast Asia,and

Australia. Rainforests are important.(46)______.Theserainforests are wet and warm.They get more than two meters of rain eachyear,and temperatures are usually between

24℃and 27℃．(47)______.Each area has a different environment with different plants,trees and animals.

(48)______.Every daya part of the rainforest,the same size as a football field,is destroyed becauseof human activities.(49)______,people cut down trees to make plantations

to grow food,to getminerals or metals out of the ground or to build more and more houses.(50)______.Cutting down trees must be prohibited and wild animals must be

protected.If peoplebreak these rules,they must be arrested and severely punished._________（49）

A.Therefore strictmeasures must be taken

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

C.Because of agrowing population

D.Unfortunately,theserainforests are in danger

E.Tropicalrainforests are home to tribal peoples who rely on their surroundings forfood,shelter,and medicines