we all know that it is important to protect our teeth

we all know that it is important to protect our teeth
We all know that it is important to protect (保护) our teeth.We’d better not eat too many candies .We’d better brush our teeth every day .A new survey (调查) in America also shows that if we drink too many sodas (碳酸饮料),our teeth will also be bad.
In America,it is popular to drink sodas.About 90 % young people have sodas every day .Most of them have more than three glasses of sodas every day.About 30% of them have bad teeth.When they eat fast food,or when are thirty,they drink sodas instead of (代替) water.But the sodas are sweet,and the sweet things can change into sour (碳酸) things,and the sour things can make the teeth bad.The American scientists say that sodas are bad for teeth.It is not good to drink sodas especially for the young people.
( ) 64.If you ,your teeth will be bad.
A.eat too many candies B.don’t brush your teeth
C.drink too many sodas D.all of the above (以上所有)
( ) 65.About young people don’t have sodas every day.
A.10% B.30% C.70% D.90%
( ) 66.According to the passage,can make the teeth bad.
A.the salty things B.the sour things
C.the hot things D.the cold things
( ) 67.The writer wants to tell us to
A.eat more fast food B.drink water every day
C.drink sodas every day D.protect oue teeth