Dick, it’s the _______ time in three days that you _______ the same mistake.

Experiments of this kind _______in both the U.Sand Europe well before the Second World War started

The man has little education but he has a lot of _____ experience.

I’m sorry you have missed the bus. It_____ five minutes ago.— What a pity!

－Why does theriver smell terrible－Because largequantities of water______