40. What does the author think about being fat?
A. It is the family genes that make people fat.
B. People are fat because they consume too little energy.
C. A diary of exercise can prevent people from becoming fat.
D. It is the consequence of people's unbalanced lifestyle.
41. According to the author, how can we make exercise mom interesting?
A. By taking varied exercise.
B. By choosing simple exercise.
C. By doing regular exercise.
D. By sticking to outdoor exercise.
42. What is the author's opinion about "No pain, no gain" in exercising?
A. Keeping lit is essentially a painful experience.
B. Exercise should be stopped if continuous pain is felt.
C. Pain in exercise is a precondition for reaching your goal.
D. Getting used to pain leads to positive changes in your body.
43. What is the purpose of the passage?
A. To declare the importance of keeping lit.
B. To clarify some misconceptions about fatness and exercise.
C. To confirm what has long been believed about keeping fit.
D. To explain some medical facts about being fat and doing exercise.