Playing too many computer games is ______ to school chidren.

The preschool children who watch TV programs with violent scenes are more likely to have sleep problems than those who watched programs        for the age.

________ students are required to take part in the boat race.

--- What’s the model plane look like?--- The wings of the plane are _____ of its body.

—Are you going to find a job or go on with your study to get a doctor’s degree? —I have had enough of ______ life. I want to find a job.