【单选题】Whether you are a smoker or non-smoker, you should take measures to protect your lungs. You can test your lung capacity by holding a lighted match about six inches from your face and trying to blow it...
A.
Necessity is the mother of invention.
B.
An ounce of prevention is worth a pound of cure.
C.
Don’t count your chickens before they are hatched.
【简答题】Let us suppose that you are in the position of a parent. Would you allow your children to read any book they wanted to without first checking its contents? Would you take your children to see any film...