What problems do the teenagers have? Here is a survey showing their main problems.

problems	Causes（原因）	Advice
Feeling stressed	Much homework. Don’t have enough time for their hobbies.	Make a plan for study and hobbies. Find time to relax as possible as you can.
Getting short-sighted （近视）	Too much homework. Bad reading and writing habits.	Do homework or read in a correct way.
Fighting with each other	Don’t know how to get on well with classmates.	Make more friends and understand each other. Share your problems with them.
Feeling tired of study	Computer games, bad influence.	Don’t be crazy about computer games. Play them just for a short time when you’re tired.
Getting fat	Have more pocket money( 零花钱 ) to buy snakes（零食）. Dislike doing exercise.	Use your pocket money to do something meaningful. Spend some time doing exercise every day.

What problem can reading and writing habits cause?
A. Getting short-sighted
B. Fighting with each other
C. Feeling tired of study
If Bob is feeling stressed, he should___________.
A. do much homework
B. make a plan for study and hobbies
C. donate（捐献）his pocket money to Project Hope
Michael is tired of study, maybe because he ______.
A. has no close friends
B. plays too many computer games
C. has no pocket money
______is a good way for the teenagers to stop fights.
A. Doing less homework
B. Playing basketball
C. Learning to make friends
If Betty often has snakes and dislikes doing exercise, she will ______
A. get fat           B. feel stressed         C. feel tired