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Q4. 
Women generally live about six years longer than men. Evidence suggests that boys are the weaker 
sex at birth, which means that more die in infancy. Also women do not have as much heart disease as men. 
In terms of lifestyle, men smoke more than women and thus more die of smokingrelated diseases. Also, 
they generally have more dangerous occupations, such as building work. 
 
Q5. 
Scientists say that rats can help look for earthquake survivors buried in the ruined buildings. Dogs are 
already used to search for people, but rats can be even more useful. Like dogs they’ve got a great sense of 
smell, but scientists still need to train rats to sniff out people and to carry special radio transmitters to let 
them know when the survivor is found. Rats may also be trained to find bombs or explosives. 
 
Q6. 
Dinosaurs roared for about 150 million years before they disappeared. We humans have only been 
around for about 2 million years. But cockroaches are 350 million years old and still going strong! 
Cockroaches can survive in extreme conditions. They can be frozen, then thawed, and walk away as if 
nothing had happened. They can go for incredibly long time without eating anything. And that is the secret 
of their success! 
 
Q7. 
Founded in 1980, BASE jumping grew out of skydiving. But BASE jumping is much more dangerous 
than skydiving that is why it is banned in many countries. Legal jumps now happen on specific days and 
from approved structures. However, like other extreme sports, it’s the risk of disaster that makes BASE 
jumping so exciting. 

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