Read the following passage and choose the best answer

Nowadays, people are destroying the rainforests of the earth seriously. It is  (23) _____ that every year 100,000 square kilometers of rain forests are (24) _____ for the supply of wood paper and fuel as well as for the residence and (25)_____ land. Rain forests are very important for the world’s climate. They receive the rainfall on the earth and produce a large amount of the world’s oxygen. Destroying rain forests,(26)_____, is destroying our environment. Saving rainforests is an international problem. Nations need cooperation to (27) _____ rain forests, if not, it will be late.

Question 23___________

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