高一英語課文填空
The birth of the earth is beyond man’s imagination.About it,____________,there is a theory ―Big Bang‖.The universe,________Big Bang suggests,sprang into being after a giant explosion,______carbon,water vapor and other gases were produced.After _______seemed unknown years of time,water,source of life,created a chain action to make it possible for life to develop.Small plants began to appear and multiply,________the oceans and seas with oxygen,which helps the development of shellfish and all sorts of fish.The evolution of life goes on and the earth is facing a great challenge in the end—a lot of carbon dioxide and pollution.To _________on the globe,life will have to struggle.