20.　 From now on, we ought to break away from the bad habit and form a good one.

19.　 From the above, I come to the conclusion that smoking does great harm to our health.

18.　 In addition to health problems, there are other reasons to give up smoking.

17.　 Study shows that cigarette smoking can cause cancers.

16.　 Experts suggest that people should have regular sports every day.

15.　 As the English proverb says, “Early to bed and early to rise, make a man healthy, wealthy and wise.”

14.　 Early rising helps to keep fit.

13.　 It’s been proved that early rising can make people full of energy.

12.　 Playing games on computers can be a waste of time.

11.　 According to a recent investigation, ……