A． The researchers' prediction several yeas ago proved to be wron
B． The overuse of media devices can do harm to youngster
C． Many children became addicted to media devices in 2005.
D． Many parents worried about their children's use of media device
A． prevailing
B． obvious
C． notorious
D． disastrous
A． the more time people spend on media use, the less time they spend on exercising
B． the lightest media users spend more time in studying, exercising and sleeping
C． the heaviest media users are more likely to suffer healthy problems
D． the heaviest media users are more likely to have emotional problems
A． has been unexpectedly increasing
B． is sure to be on the decline soon
C． is not able to increase any more
D． is reported to reach its climax