1.Industrial
technology began with the development of the engine steam, didn`t it?
Did industrial
technology begin with the development of the engine steam?
Did industrial
or commercial technology begin with the development of the engine steam?
When did industrial
technology begin?
What began
with the development of the engine steam?
2.Scientists
study a wide variety of subjects, don`t they?
Do scientists
study a wide variety of subjects?
Do scientists
or professionals study a wide variety of subjects?
What do scientists
study?
Who studies
a wide variety of subjects?
3. People
can watch sports events on TV, cannot they?
Can people watch
sports events on TV?
Can people watch
sports events on TV or on the radio?
Who can watch
sports events on TV?
What can people
watch on TV?