admission
adult
air
asia
asian
background
business
china
class
classroom
college
concentration
corona
covid19
dangerous
difficult
doing
education
exam
examination
hand
health
infect
infection
mask
national
paper
pencil
people
person
pollution
problem
protect
quiz
row
school
sick
stress
student
students
studying
taking
teacher
test
toxic
training
uniform
university
virus
writing
定額
Students wearing mask for protect corona virus or covid-19 and doing exam answer sheets exercises in classroom of school with stress.の素材 [FY310143108700]
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