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Topic 1: The tiger

    
        The tiger is classified as an endangered animal by the world
Conservation Union. There are no more than 5000-7000tigers remaining
 in the wild. What’s more, the population of the tiger has fallen by about
 95% since the beginning of the 20^th century. They now occupy only 7%
 of their original habitat because of the economic development. In addition,
 loss of habitat and natural prey also lead tigers to starvation and death. 
They are really endangered animals now.

Topic 2: The benefits and risks of genetically modified food.

       
        Genetically modified food is not a good choice for the consumer. 
To begin with, scientists may add some chemical elements to the food. 
For example, people add genes of fish to tomatoes. This kind of food may
 be harmful to people though it is delicious. Furthermore, it is so expensive
 that ordinary people can not afford it. In addition, GM food can hurt 
surrounding insects, which will break the balance of our nature. Taking all 
these factors into consideration, people can not take the risk of their own 
health, which is most important. To sum up, GM food is not a wise choice
 for everyone.