6．
根据短文内容和所给中文提示，在空白处写出正确的单词，每空一词。
As we know, all living things have to eat food. For a man, a tiger, a fish, a bird, or even a worm, food is (必需的). Generally speaking, all living things are sure to (死) without food. In every part of the world, many different kinds of animals share living places and live in communities (群落) (一起). They are connected in a food chain(链).
Within a food chain， some living things are producers and some are consumers (消费者). Plants are producers because they use (阳光)，soil and other things to make their own food. Animals are consumers because they have to eat other animals or plants.
There are four (不同的) kinds of consumers in the animal kingdom. A carnivore is an animal that only eats flesh(肉). A herbivore is an animal that only eats plants. An omnivore is an animal that eats (都) meat and plants. A scavenger is an animal that eats dead animals.
Look at the picture. It is an (例子) of a food chain. The food chain (显示) the order that animals eat each other in a community. In the picture, you can see what animal or plant is food for (另一个) animal. See? A leaf is food for a grasshopper, which then becomes food for a hungry mouse. The mouse is food for a snake. The snake is eaten by an eagle. (用) this way, all of these living things are connected.
