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Passage Four Imagine taking a dust bath to keep clean! Sparrows have to bathe in dust to keep pes...

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nervous  preening  having a good time  very clean  
all birds live water  birds get very dirty  staying clean is very important to birds  preening takes a lot of time  
how birds lay eggs  how birds keep clean  birds that like water  birds that eat bugs  
how birds lay eggs  how birds keep clean  birds that like water  birds that eat bugs  
keep clean  find food  build its nest  keep its feather dry  
taking up    turning up    bringing up    pulling up  
four thousands of    four thousands    four-thousand    four thousand  
taken to deal with    taken dealing with    took to deal with    taking dealing with  
talked about  helpful  unusual  best  
when proceeding along the course of a narrow channel or fairway  when taking avoiding action in accordance with the steering and sailing rules  when navigating within a narrow channel or fairway  when impeding the passage of another vessel  
keep clean  find food  build its nest  keep its feather dry  
talked about  helpful  unusual  best  
nervous  preening  having a good time  very clean  
was taking    would take    took    was taken