Passage 2

　　There are some steps you can take yourself to avoid cat catching cold.Contrary to popular belief,colds are not caused by exposure to severe weather.Colds are caused by viruses(病毒)harbored in the body,and you're better off out on the ski slopes even waiting for the bus on a snowy day than you are in a rather warm room,surrounded by friends,co-workers,or fellow students,who just may be passing the virus around.If you feel a chill(發(fā)冷)when you're coming down with a cold,you're already sick.A shill is an early symptom:It's the cold that caused the chill,not the other way around

　　While the virus can spread through droplets propelled into the air when a cold-sufferer coughs or sneezes,surprisingly,this is not the most common route of transmission.Studies have now shown that the overwhelming majority of colds are “caught”by hand contact.A cold-sufferer rubs her nose,thereby transferring the virus to her hand.Then a friend comes to visit.“Don't kiss me,”she cautions,so the friend steps back and presses her hand.The friend then wipes her own nose or eye-and several days later is stricken with a cold.Or parents pick up their child's discarded tissues(面紙)and carefully throw them away,but fail to wash their hands afterward.

　　Cold viruses also can be transferred to objects-telephones,towels,

　　plates-and remain in fectious for up to three hours.Frequent hand-washing-on the part of the cold-sufferer as well as other members of the household-will minimize the spread of viruses in this way.

　　5)Which of the following steps you take will most probably cause you to catch a cold?

　　A.To expose yourself to sever weather.

　　B.To be on the ski slopes.

　　C.To wait for the bus on a snowy day.

　　D.To stay in a rather warm room with a lot of prople.

　　6)To prevent viruses from spreading,we should________.

　　A)shake hands with our friends instead of kissing them

　　B)never touch the telepones,towels or plates

　　C)often wash our hands

　　D)often rub our noses and eyes

　　7)The best title for this passage might be________.

　　A.Colds and Viruses

　　B.Ways to Avoid Colds

　　C.The Spread of Viruses

　　D.Hand Contact and Transmissions of Viruses

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