2．
The undersea world is very beautiful．Now more and more people want to dive in the water to find the secrets there．Scuba diving is a new sport today．It can take you into a wonderful undersea world．
You will find many strange animals in the sea．Some are as large as a school bus．Many sea animals give out light in the dark and some have sharp teeth．
（3）在白天，有足够的光线，在那里一切都是兰色和绿色．When fish swim nearby，you can catch them with your hands． （4）When you have bottles of air on your back，you can stay in deep water for a long time．However，you can't dive too deep．And you must be very careful when you dive in deep water．The deep sea is not an easy place to live in．It's cold，and it's dark，too．The deeper it is，the less sunlight there is．At about 3，000feet，there is no light at all．It is dark in the sea．Many fishes have no eyes．Some have big eyes．A few have eyes on one side．
Besides （除了） the cold and darkness，deep-sea animals face a third danger---
other animals．Animals eat!They must find food to eat．Many animals eat plants．However，some Animals eat meat．This means these sea animals have animals have two big jobs．They need to find animals as food，and they have to try not to become other animals'meal．
根据短文内容简要回答问题．
1．Why do people want to dive in the sea？
Because they want to find the secrets of the undersea world．
2．How many dangers will animals meet in the deep sea？
Three．．
3．将（3）处画线的句子译成英语．
During the day，there is enough light．Here，under the sea，everything is blue and green．．
4．将（4）处画线的句子译成汉语．
当你背上氧气瓶的时候，你能够在深水里呆很长时间．．
5．What is the main idea of the passage？
The world of the undersea或Theunderseaworld．．
