We should always keep in mind that ______ decisions often lead to bitter regrets.
The football match _______ the students competed yesterday was very wonderful.
The reason _______ he was late again was that he was caught in a traffic jam in the rush hour.
His glasses, _______ he could see nothing, was taken away by a naughty boy.
The computer, _______ he paid ¥3,000, was once owned by his uncle.
In the past we lost many chances, _______ we paid little attention.