一 书面表达
3.参考范文：
From the picture we can see a polar bear sitting on a small piece of ice with a penguin on its head.It shows that our environment is worsening day by day and some wild animals are in great danger.
In recent years，with the development of science and technology，the Earth is faced with a variety of environmental problems，including global warming.As a result，many animals have lost their natural habitat.
I think it is time that we took effective measures to protect the environment.We should avoid using fossil fuel to reduce green house gas，and we can plant more trees to take in carbon dioxide.
