Which sentence below is true ? 
A.Conflicts improve when a natural resource crosses political borders.
B.The source of a main river may be located in the country through which the river flows than s different country.
C.The way where one ordinary source is managed has a direct effect upon other ordinary sources .
D.There is assurance that river source will be confined to provide accommodation for resource needs downstream .

What may bring water to agricultural irrigation ? 
A.A river
B.topsoil 
C.erosion
D.a forest

Which word in the reading means “a promise that something will be done or will happen , especially in a particular period of time ?”
A.Shortage
B. guarantee 
C.population 
D.habitat

A.ethic        
B.breathe    
C.marathon               
D.path

A.Monday
B.monkey     
C.punctual   
D.language

A.knees       
B.papers   
C. trees    
D. bats

A.incredible      
B.humidity   
C.necessary 
D.polite

A.operation 
B.associate    
C. revolution 
D.independence

A.miraculous
B.accessible  
C.technology 
D.apprehension

A.interviewer 
B.concentrate   
C.comfortable     
D.technology