It is said that the old pot ____under the earth for about 1000 years by the time it was discovered.
You'd better not have the lights _____ all day long.
_____ the same mistake again made his parents very angry.
She said she was sorry _____ the train, so she had to stay here for another day.
Although swimming is his favorite sport, yet he doesn't like _____ today.
Saying always has less difficulty than _____.