You may know about"junk food"like French fries.But do you know about"junk sleep"?Recently,a British survey （调查） shows that there are many electronic products in teenagers\’ bedrooms.They are influencing teenagers\’ sleep （1）______（bad）.
The survey （2）______（do） among 1,000 British kids from twelve to sixteen.It found that 50% of them got just four to seven （3）______（hour） sleep every day.But doctors say they need 8 to 9 hours.Almost 25% of the kids said they often fell asleep while they （4）______（watch）TV,listening to music or using other electronic products.
"This is very （5）______ （worry）, "said Dr.Chris,a British professor."We call it \’ junk sleep\’.It（6）______（mean） you don\’t get enough sleep and the quality of the sleep is low,too.If you don\’t get （7）______ good rest,you won\’t do well in school the next clay."
The survey found that quite a few of the kids felt tired each day because （8）______ the junk sleep,especially girls between 13 and 16 feeling the worst.Nearly all the teenagers have a phone,MP5 or TV in their bedrooms.And lots of （9）______（they） even have all the three.
Dr.Chris suggested that parents should help their children keep away from electronic products(10)______（have）a good sleep,and teenagers should spend less time on the electronic products.