A.does it
B.doesn't it
C.isn't it
D.is it

A.does it
B.doesn't it
C.isn't it
D.is it

A.A panel
B.uninterested judges
C.contestants
D.judged

A.woke up late
B.get much sleep
C.have been worrying
D.all night

A.he thought
B.ahead of
C.Some
D.because

A.he thought
B.ahead of
C.Some
D.because

A.Teens whose parents broke up can't sleep well.
B.Parents can help their children sleep better by restricting their use of technology.
C.Parents have nothing to do with their children's health habits.
D.Teens are unable to perform well at school if they don't get sufficient sleep.

A.insecurity
B.happiness
C.excitement
D.worrying

A.Teens who feel like talking with their parents.
B.Teens who lack a sense of security at school.
C.Teens who have friends sharing their dreams.
D.Teens who feel contented about themselves.

A.parents
B.family dynamics
C.warm relations
D.teens