Choose the best answer to complete each unfinished sentence, substitutes the underlined part, or has a close meaning to the original one.

Câu 1: Humans depend on species diversity to provide food, clean air and water, and fertile soil for agriculture.

A. destruction              

B. contamination         

C. fertilizer                  

D. variety

Câu 2: Life on Earth is disappearing fast and will continue to do so unless urgent action is taken.

A. vanishing                

B. damaging                

C. polluting                

D. destroying

Câu 3:  Hunting for meat and burning forests for soil cause destruction to wildlife.

A. organization            

B. contamination         

C. protection               

D. damage

Câu 4: We have to apply effective measures to save many plant and animal species _______ extinction.

A. from                        

B. in

C. for

D. on

Câu 5: Over-exploitation for food, pets, and medicine, pollution, and disease are recognized _______ a serious threat _______ extinction.

A. as/ of  

B. to/ for  

C. over/ with    

D. upon/ at

Câu 6: Clearing forests for timber has resulted _______ the loss of biodiversity.

A. with                        

B. at

C. in

D. for

Câu 7: The world's biodiversity is declining at an unprecedented rate, which makes wildlife _______.

A. prosperous              

B. prefect                    

C. vulnerable               

D. remained

Câu 8: _______ is the protection of environment and natural resources.

A. Survival                                   

B. Commerce                    

C. Conservation          

D. bridge

Câu 9: Toxic chemicals from factories are one of the serious factors that leads wildlife to the _______ of extinction.

A. wall                                        

B. fence                       

C. verge                     

D. bridge

Câu 10: Contamination and global warming have driven many species of animals and plants _______ the threat of extinction.

A. for                                     

B. to

C. with 

D. on

Câu 11: Although we are aware _______ the importance of environment, we still overexploit it.

A. from

B. on

C. for

D. of

Câu 12: They have built a particular reserve' which is suitable _______ pandas.

A. at

B. upon

C. in

D. for

Câu 13: Many species have become extinct each year before biologists can identify them.

A. destroy                    

B. drain                       

C. endanger                 

D. discover

Câu 14: If an area is _______, all the trees there are cut down or destroyed.

A. endangered             

B. deforested              

C. contaminated          

D. polluted

Câu 15: Humans depend on species diversity to provide food, clean air and water, and fertile soil for agriculture.                        

A. raise                        

B. produce                   

C. supply                     

D. reserve

Câu 16: Many schools provide environmental education to increase students' awareness of conservation needs.

A. effort                       

B. benefit                     

C. exploitation             

D. knowledge

Câu 17: All the countries of the area have _______ to protect their wildlife but they are rarely enforced.

A. efforts                     

B. laws                        

C. results                     

D. reserves

Câu 18: Forest dwellers had always hunted the local _______ but their needs had been small.

A. wildlife                   

B. commerce               

C. reserve                    

D. generation

Câu 19: 15,589 species (7,266 animal species and 8,323 plant species) are now considered _______ risk _______ extinction.

A. at / of  

B. on / in  

C. for / with 

D. in / at