21.   The Popaj family is confined to living in two rooms whose only furniture is a couple of thin mattresses.

22.   There is little furniture besides piles of thin mattresses and cupboards are crammed with blankets.

23.   Three thin mattresses are piled in a corner.

a. + mattress >>共 138
thin 7.77%
old 6.42%
straw 3.72%
soft 2.70%
soiled 2.70%
new 2.36%
firm 2.36%
dirty 2.03%
good 1.69%
filthy 1.69%
thin + n. >>共 844
layer 7.38%
air 5.97%
slice 5.16%
line 4.08%
coat 3.10%
strip 3.02%
ice 2.02%
stream 1.86%
volume 1.76%
film 1.39%
mattress 0.58%
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