After all the students had taken their seats, the teacher _______the examination paper.
The doctor must be _______ 24 hours a day, 7 days a week in the boarding school.
What was considered impolite years ago has become ________now.
Which way do you enjoy _______ the coming winter holiday, staying home or going on a trip to Europe?
_______ worries the public a lot the way the students are getting more and more stressed out.
The Tenth Art Festival held in Jinan _______ to many people from the world.