读短文，判断正(T)误(F)。 Long ago there were many animals on the earth. But now we can't see some of the animals, because they died, such as(例如) dinosaurs. Some animals died of natural disasters(死于天灾). But some died because man did bad things to the nature(自然界). People cut trees and built tall buildings. So some animals had no food to cat, no homes to live in or clean water to drink. Man killed animals, too. Now some animals are dying(死) out, such as pandas and antelopes(藏羚羊). If we don't want the animals to disappear(消失) from the world, we should protect(保护)  the nature and animals. (     ) 1. Once there were many animals in the world. (     ) 2. Some animals died, because the other animals killed them. (     ) 3. Some animals died, because man did bad things to the nature. (     ) 4. We are going to lose pandas if we don't protect them. (     ) 5. Some animals are disappearing.