указать время и залог 1. They improve creativity and social skills. 2. Professionals with a technical background like technicians, engineers, doctors, biologists, mathematicians and scientists are needed for improving the economies. 3. In the past, philosophy, for example, was seen as the mother of all sciences. 4. They create medicines and new materials, build robots and spaceships and so on.

1. They improve creativity and social skills. - Present Simple Active

2. Professionals with a technical background like technicians, engineers, doctors, biologists, mathematicians and scientists are needed for improving the economies. - Present Simple Passive

3. In the past, philosophy, for example, was seen as the mother of all sciences. - Past Simple Passive

4. They create medicines and new materials, build robots and spaceships and so on. - Present Simple Active