Where do you think people will live in the future? Can you imagine 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 submarines will be as many as today’s cars. A famous French driver says, “One day, people will work on the ocean floor as they do on the street!”.
If people want to live in the sea, they have to solve a lot of problems, like those of living on the moon such as lack( 缺 少 ) of oxygen and weightlessness( 失 重 ). Many problems 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 people will be able to live in the sea, away from the noisy cities on land. They will find it fun and interesting to live in the sea. And life in the sea is more comfortable. Don’t you think so?
Maybe people in the future will to work on the ocean floor.

A．drive a car

B．take a bus

C．take a submarine

D．swim

.What problem will people have if they live in the sea?

A．They will feel cold.

B．They will feel tired.

C．They will become quite heavy.

D．They will have difficulty in breathing.

The writer thinks living in the sea is       than living on land.

A．better

B．worse

C．easier

D．noisier

Which of the following is NOT true according to the passage?

A．People may be weightless in the sea.

B．The sea is noisy and crowded for man to live.

C．Some scientists believe submarines will be popular in the future.

D．There are some problems to solve if people want to live in the sea.

What's the best title of the article?

A．Living in the Sea	B．Living in Submarines
C．Living on Land	D．Living on the Moon