生活给水管道的水流速度，不宜大于（）。 A.0.2m/s B.2m/s C.20m/

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

Problems	Causes	Advice
Feeling Stressed	Too much homework. Not having 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 reading in a correct way.
Fights	Not knowing 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 are tired.
Getting fat	Having more pocket money to buy snacks; Dislike doing exercise.	Use your pocket money to do something meaningful. Spend some time doing exercise every day.

 
小题1:How many main problems are there in the survey?

A．Four.

B．Seven.

C．Six.

D．Five.

小题2: What problems are caused by too much homework?

A．Feeling stressed and getting short-sighted.

B．Feeling stressed and fighting with classmates.

C．Feeling tired of study and getting fat.

D．Getting short-sighted and feeling tired of study.

小题3:________ is a good way for the teenagers to stop fights.

A．Doing less homework

B．Paying no attention to each other.

C．Learning how to make friends

D．Playing computer games.