12．Look after the Earth
The population of the Earth is growing faster.66．保護地球是很重要的．We need it!
The Earth gives us a lot of things．We also give the Earth a lot，but some of the things are not good．
In nature，when something dies，other animals and plants get food from it.67．Every animal or plant
gives food for other animals or plants．However，animals can't get food from many of the things that we‘give'the Earth．Animals and plants can't eat metal，plastic and glass．These things will stay in the ground for many，many years．
68．Some rubbish is very dangerous for plants and animals．In some places，69．many animals live
together．One animal makes food for many more animals．If we put rubbish and chemicals in the water，the plankton（浮游生物） can die．If there isn't any plankton，many animals have nothing to eat．
So what can we do？Don't leave any rubbish in the countryside!70．Don't make so much rubbish！
66．It's important to protect the Earth．67．每一種動物或植物都會從其他動物或植物上獲取食物．68．一些垃圾對植物和動物來說是非常危險的．69．很多動物住在一起70．不要制造那么多的垃圾!．
課課優(yōu)能力培優(yōu)100分系列答案
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