W: Professor Smith, last time we talked about third-hand smoke. Can you say more about it?M: Of course, we know that breathing in other people's smoke is nearly as unhealthy assmoking on our own.W: So when I enter a car or a building where people have been smoking, is that bad news?M: Yes, it is potentially bad news to you.W: But why? Doesn'tthe smoke vanish after the smoker leaves?M: Certainly not. When smoke curls off the lit end of a cigar or a cigarette, it may seem to vanish. But many dangerous chemicals in cigarette smoke don't actually disappear. They soak into walls, floors, furniture, and even clothing. This so-called third-hand smoke can react with common household chemicals to form dangerous compounds.W: So, that means if you're in a house or a car where people smoke and you brush up against a wall or furniture, your skin could come into contact with dangerous chemicals.M: Exactly.W: In that case, infants can be easily affected by third-hand smoke.M: Right, it is especially risky for infants who are most likely to roll around on smoke-soaked carpets.W: What diseases can be caused by it?M: It's not yet clear how likely it is to cause diseases like cancer, but study suggests that it may indeed pose a threat. So unless you want your skin to be hurt, it's best to avoid places where people light up.1.What will happen if people have been smoking in a car or a building?A) The smoke in the car or the building will easily vanish soon after the smokers leave.B) The walls, furniture and even clothes will be soaked by the smoke in the car or the building.C) Many dangerous chemicals in the car or the building will easily disappear after the smokers leave.D) The smoke will react with dangerous compounds in the car or the building to form common chemicals.2.What will happen to you when you are in a room where people have been smoking?A) Your clothes will be easily damaged by the dangerous chemicals caused by the smoke in the air.B) The common chemicals inside your body will react with the smoke and form some dangerous chemicals.C) Your skin could come into contact with dangerous chemicals when you touch a wall or furniture in the house.D) The dangerous compounds formed in the air will soon enter your body and cause some serious diseases.3.Who can be most easily affected by third-hand smoke?A) Babies. B) Old people.C) Women.D) Young people.4.What can we do to avoid third-hand smoke according to the professor?A) We should ban smoking both in public and private places.B) We can put on more clothes in order to protect our skin.C) We can simply stop people from smoking around us.D) We'd better keep away from the places where people light up.