The police were called in, but they could not __________（逮捕）any-one.
In order to enjoy good health, people should (为...保留时间）some time for exercise.
The senior three students in our school are making full p _________________ for the coming College Entrance Examination.
The terrible news terror into people’s hearts.（使.....刻骨铭心）
Several passers-by claim to have w____________ the accident.
Everyone in the class is expected to （参加）in the discussion.