1)
Does technology make life easier?
Does
technology make life easier or more difficult?
Technology
makes life easier, doesn't it?
What
makes life easier?
What
does technology make easier?
2)
Does radio broadcast news?
Does
radio broadcast news or music?
Radio
broadcasts news, doesn’t it?
What
broadcasts news?
What
does radio broadcast?
3)
Did they start researching this problem yesterday?
Did
they start researching this problem yesterday or last month?
They
started researching this problem yesterday, didn't they?
Who
started researching this problem yesterday?
When
did they start researching this problem?
4)
Did sciences contribute much to modern technology?
Did
sciences contributed much or little to modern technology?
Sciences
contributed much to modern technology, didn't they?
What
contributed much to modern technology?
Where
did sciences contribute much to?