beaches, birds, boxes, cats, classrooms,

classmates,dolphins,dumplings, elephants,

giraffes,groups,gyms,hospitals,houses,keys,key rings,koalas,leaf,leaves,library

lions,magazines,mails,malls,maps,mountains,mewspapers,noodles,onions,pandas, pen pals ,penguins,potatoes,reasons,rules

,scarf-scarf或scarves,thief-thieves,

tigers,toys,units,wallets,zoos,animals,

jobs,doctors,questions,actors,movies,photos.