阅读理解。 When do you think of a forest, what do you see? Just trees Or do you see many other things, such as singing birds, colorful plants and wild flowers? The forest is a whole world of its own. It is full of many different living things (生物). But even though they are all different, they have one thing in common: they all need each other in order to live on. The trees feed the forest 'people' by making food in their leaves; by using sunlight to join water and minerals(矿物) from the soil and air. Their deep network of roots Joins the soil together and stops it from dying out, making it possible for living things to live in it. Human beings (人类) are like the living things in the forest. We need one another in order to live. We need the farmers to grow our food, railroad and truck drivers to bring it to our shops and clerks (售货员) to sell it to us. We need people to prepare our food and cook it and others to take our waste things away. Then, of course, we need doctors, nurses, government leaders, mailmen, telephone operators, and many others. We also need other human beings in another way. We need people for friendship, to talk over our problems, exchange ideas. Think how lonely and unhappy you would be if you lived all alone. Life is a matter of giving and taking. We need to help other people as much as we need other people to help us. Think what a good feeling you have when you have done something for someone else. You know, being a volunteer is so great! 1. According to the text, colorful plants and flowers live on _____. [     ] A. the leaves of the trees B. water and minerals C. the soil and air D. all of the above 2. It is the that make it possible for living things to live in the forest. [     ] A. trees B. birds C. plants D. farmers 3. According to the writer, human beings are _____ the forest 'people'. [     ] A. different from B. like C. dislike D. unhappy with 4. The writer mainly wants to tell us _____. [     ] A. we need people for friendship B. we need one another in order to live C. the forest is a whole world of its own D. the forest is full of different living things 5. Which one is the relationship (关系) between a forest and your life? [     ] A. We can see trees in the forests. B. We like the living things in the forest. C. We need farmers to grow our food in the forest. D. We are the same as the forest: We need each other to live on.