adult
back
background
book
burn out
business
businessman
casual
caucasian
class
concentration
desk
educate
education
face
file folder
files
folder
friendly
homework
isolated
knowledge
learn
male
man
many
office
one
paper
pen
people
person
portrait
proble
read
senior
serious
sitting
smart
sorrow
study
studying
table
teach
test
thinking
too much
university
white
work
working hour
writing