Put rhe verb in brackets into the present simple or the present continue

1 Подобно всем современным научным и технологическим начинаниям,
компьютеры и программное обеспечение играют все более важную роль.
play - Present Simple Active

2 Разработчики применяют достижения математики и физики для того, чтобы находить надлежащие решения проблем и производить улучшения.
apply - Present Simple Active

3. Разработкой этой гипотезы занимались многие исследователи.
was undertaken -  Past Simple Passive

4. Теперь от разработчиков требуется знание соответствующих наук для разработки их дизайн-проектов.
are required - Present Simple Passive

I want to tell you about British teenagers and their problems. British teenagers feel pressured at school.  Teenagers in this country are concerned they are too fat or  higher than the international average. They drink too much alcohol. England is the only country where more girls report getting drunk on more than two occasions than boys. They also smoke too much. According to an international study that finds they are among the least satisfied with their lives compared with other kids  around the world.Researchers who conducted the study of children in 42 countries said 15-year-old girls in England, Wales and Scotland appeared to be at particular risk, suffering from high levels of stress and worries about health.