Where do you think people will live in the future? Can you predict people will work and live in the sea? But how will people go to work then? By submarine (潜水艇) Some scientists believe that some day submarine will be as many as today's cars. A famous French drivers says 'One day,man will work on the ocean floor as they do on the street!'
If humans want to live in the sea, they have to solve a lot of problems, similar to those of living on the moon, are lack of oxygen (缺氧) and weightlessness (失重). Many questions are hard to solve. For example, what will happen to our bodies if we live in the sea for a very long time?
Scientists are looking for answers.
Maybe in 50 years man will be able to live in the sea,away from the crowded and noisy cities on land. Man will find it fun and interesting to live in the sea.
And life in the sea is more comfortable. Don't you think so?
判断正误（“T”表示正确，“F”表示错误）；
Some scientists think people will have to live in the sea.(    )
完成句子；
If humans want to live in the sea, they                  first.
简略回答问题；
What problem will humans have if they live in the sea?
                                                        .
简略回答问题；
How will people go to work if they live in the sea?
                                                        .
将文中画线句子译成汉语。