We now know that human activity can have a serious influence on the vital forces of our planet. We have fundamentally changed our global climate and are just beginning to understand the consequences of that.

　　As yet largely unseen, but just as serious, are the influences we are having on the ocean. A healthy ocean has diverse ecosystems and strong and healthy habitats. The actual state of our ocean is a far cry from this natural state.

　　A lot of pressure is being put directly and indirectly on ocean ecosystems by human activities. Consequently ecosystems are breaking down as marine species are in danger of dying out and ocean habitats are being destroyed. With the decrease in their diversity, ocean ecosystems are losing their natural way of recovery. 

　　We need to defend the ocean now more than ever, because climate change is having a potentially disastrous impact on the marine world. 1、. What can we learn from Paragraph 2?  

　　A. What the ocean looks like. 

　　B. What the ocean is made up of.  

　　C. What live in the ocean.  

　　D. What functions the ocean has. 2、. According to the text, the ocean directly provides people with ____.  

　　A. water forming rivers

　　B. comfortable habitats

　　C. all the natural forces they need

　　D. driving forces for energy and nutrients 3、. It is not realized by many people that we have ____.  

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