____ the pressure from work, teachers have to deal with psychological problems caused by the relationship between students.
The first edition ________ in 1955 and ________ a best seller ever since.
The boy is often found _____in reading books.
We don’t know if she _____ home. If she ____, I’ll tell you.
It’s required that the students___ mobile phones in their school, so seldom ____ them using one.
The old lady was ________at the thought of the ________experience in the forest.