________(39)
A.take   
B.waste         
C.occupy    
D.spend

________(38)
A.considering   
B.held       
C.taken        
D. kept

________(37)
A.upkeep    
B. maintenance        
C.upbringing  
D.raising

________(36)
A.facets     
B. elements 
C. factors  
D.points

________(35)
A.near    
B. close  
C.narrow
D. tight

Traditionally, the flag is risen in the morning and taken down at night.
A.risen
B.in the morning
C.taken
D.at night

Please send me information with regard of insurance policies available from your company.
A.me
B.with regard of
C.insurance
D.from

________(41)
A.confined  
B.detained       
C.reduced    
D.closed

________(42)
A.so   
B.for     
C.much 
D.such

Why is “ plankton” mentioned in line 16? 
A. To demonstrate the interdependence of different species
B. To emphasize the importance of food resources in preventing mass extinction.
C.To illustrate a comparison between organisms that live on the land and those that live in the ocean
D.To point out that certain species could never become extinct.