5.
1) books, clocks, parks
2) fields, teams, machines
3) boys, taxies, hours
4) churches, classes, roses
5) tomatoes, radios, videos
6) countries, ladies, communities
7) leaves, wives, chiefs
8) sheep, policemen, crisis, women-doctors, mothers-in-law
trees
stories
problems
gentlemen
wolves
heroes
basis
women-drivers
towns
holidays
teachers
buses
shops
children
brushes
shelves
exams
matches
companies
subjects
pages
photos
fish
roofs
money
passers-by
party
knife
potato
tooth
good
mouse
university
map
time
watch
day
question
word
spectacle
data
jeans
room
dish
person
paper