B (sturgeons are getting rare; overfishing)

Answer Key

1. 
   b
   
2. 
   b
   
3. 
   b (sturgeons are getting rare; overfishing)
   
4. 
   a
   
5. 
   b (take care of animals, feed them, clean their cages etc.)
   
6. 
   a
   
7. 
   b
   
8. 
   a
   
9. 
   a
   
10. 
    b (check timetable)
    
11. 
    a (cold, snowy, rainy)
    
12. 
    b
    
13. 
    b
    
14. 
    b
    
15. 
    b
    
16. 
    b
    
17. 
    b
    
18. 
    a
    
19. 
    b
    
20. 
    a