The past: 

- There are few schools, hospitals, health facilities, and education, buildings

- The life is hardship, lack

- The work is difficult,

- There isn't any vehicle.

Now:

- There are a lot of schools, hospitals, health facilities, and education, buildings

- The life is convenient

- The work is easy

- There are more and more vehicle on the street.

In the past there was no advanced technology. All housework must be done by hand and without assistive devices Most cars are bicycles and motorbikes. Until the recent centuries, new cars gradually became popular. Today the constructions are made mostly by machines without using human power. In the near future, humans are planning robots to completely replace people in labor-intensive jobs such as helping robots, ... The technology is now also much more advanced. Students no longer have to struggle to find a solution to a difficult problem. Technology services to help you learn foreign languages ​​are increasing. But when it grows, environmental pollution and the population of the unemployed are increasing. To overcome the need for improved and more intelligent measures