Put 5 types of questions for each sentence: researchers make observations. technology makes life easier. radio broadcasts news. they started researching this problem yesterday. sciences contributed much to modern technology. в общем, должно получиться 25 вопросов!

1)Do reseraches make observation?
Who make observation?
What do researches make?
What do researches do? 
2)Does technology make life easier?
What makes life easier?
What does technology do?
How does technology make life?
What does technology do?
3)Does radio broadcast news?
What broadcasts news?
What does radio broadcast?
What does radio do?
4)Did they start researching this this problem yesterday?
Who started researching this problem yesterday?
What did they start researching yesterday?
When did they start researching this problem?
What did they do yesterday?
Which problem did they start researching yesterday?
5)Did sciences contribute much to modern technology?
What contributed much to modern technology?
What did sciences do to modern technology?
Why did science contribude?
How did science contribute to modern technology?

Вот, правда, 25 не получилось, потому что к некоторым предложениям можно задать не более 4х вопросов))