3.  What''s the best title of this passage?

본문 
     The smoke in the air tat is breathed by non-smokers is known as "secondhand smoke."
     Four thousand lung cancer deaths annually are caused by secondhand smoke.
     Studies have found that nonsmoking wives of smoking husbands have a 30 percent increased
     risk of lung cancer compared with women whose husbands don''t smoke.
     And nonsmokers married to heavy smokers were found to have two  to there times the risk of
     lung cancer compared with those married to nonsmokers. In addition to in  creasing the risk of  lung  cancer,  secondhand smoking also causes heart disease.  It seems that cigarettes are not
     only harmful to the smoker.

1)  The Rights of Nonsmokers      2) Smoking :  The Cause of Lung Cancer
3)  The Danger to Secondhand Smokers     4)  The Results of Smoking  in Households
5)  The Meeting of Passive Smoking


4.   What is the main idea of the passage?

본문
     Going to a salad bar doesn''t guarantee a healthy meal.  For the most nutritious plate,
     choose dry vegetables of many colors.   If your favorite dressing is high in fat.
     put it in a separate container and use it as a dip.  To assemble a healthy salad bar
     lunch. start by filling your plate with darkly colored lettuces,  then pile on bell
     peppers, tomatoes,  beans,  and any other "dry" vegetables of as many colors as
     you can.  If you wish, add a sprinkling of cheese.  Remember, add-ons like cheese,
     dressing and oil have lots of hidden calories and fat,  so use thm sparingly for the 
      most nutritious meal.

  1)  Colors influence upon emotions.
  2)  We should be careful when we eat vegetables.
  3)  People tend to use a lot of disposable products. 
  4)  We can keep healthy by avoiding meats.
  5)  We should not be interested in appearance.