1 Oil and gas reserves will run out in less than 50 years.
Will oil and gas reserves run out in less than 50 years?
Why will oil and gas reserves run out in less than 50 years?
Will oil and gas reserves run out in less than 50 years or 10 years?
What will run out in less than 50 years?
Oil and gas reserves will run out in less than 50 years, won't they?
2 He mixed the Coca-Cola syrup with carbonated water.
Did he mix the Coca-Cola syrup with carbonated water?
When did he mix the Coca-Cola syrup with carbonated water?
Did he mix the Coca-Cola syrup with carbonated water or with cognac?
Who mixed the Coca-Cola syrup with carbonated water?
He mixed the Coca-Cola syrup with carbonated water, didn't he?
3 The first advertisement appeared in the Atlanta Journal.
Did the first advertisement appear in the Atlanta Journal?
Where did the first advertisement appear?
Did the first advertisement appear in the Atlanta Journal or in the Times?
What the first appeared in the Atlanta Journal?
The first advertisement appeared in the Atlanta Journal, didn't it?
Объяснение:
