主题结构图
I Plants and animals are special to Chinese.
Bamboo is one of 1__ （最受欢迎的）subjects in Chinese paintings. It's 2__（……的象征） goodness in Chinese culture. One interesting fact about bamboo is its growing speed. It can grow 3__ metre in a day. It is also4__（最有用的植物之一）. It can be used to5__ （建房 子） and make tools and instruments. It's also a kind of delicious food for both pandas 6__ humans.

1. the most popular
2. a symbol of
3. one
4. one of the most useful plants
5. build houses
6. and

Ⅱ People and nature are closely connected.
Bees are very hard-working animals, and their greatest work is1__ . As they fly from one flower 2__ another, they take pollen with them. This action helps plants grow. Without their work, about 80% of the plants in the world cannot grow. That's why bees are believed to be3__（最重要的动物之一） on this planet.
Bees are one of the most interesting animals in the world too. For4__ , they work together to make homes. In order to 5__（储存蜂蜜） , they create 6__（蜂巢）. Another interesting thing about bees is how they 7__（沟通）. When a bee finds new food, it uses a dance to tell the others.

1. pollination
2. to
3. one of the most important animals
4. example
5. store honey
6. honeycombs
7. communicate

Ⅲ Plants and animals are important to the world.
The blue whale is 1__（最大的和最重的） animal on earth. Blue whales live in all oceans 2__ the Aretic Ocean. They eat some of 3__（最小的） animals in the ocean. They can 4__（活到） 90 years. When a blue whale dies at sea, it becomes food for 5__（很多种类的） animals living in and around the sea. This food 6__（持续） over a year and helps to create7__（一个生机勃勃的、健康的生态系统）. Blue whales8__（扮演重要角色） in our world, so we must protect them.

1. the largest and heaviest
2. except
3. the tiniest
4. live up to
5. many kinds of
6. lasts
7. a lively and healthy ecosystem
8. play an important role