when

What shall we use for power when all the oil in the world has _____?

Farmers ____ by government to do odd jobs in cities when they are free.

When we saw his face , we knew _____ was bad

He sliced his finger ____ when doing dishes

---“When _________ the training course begin?” ---“Next Monday.”

He paid for a seat, when he _____ have entered free

When will the work __________?

When _____ where he was born, John said he was a New Yorker.