I had just taken a bite of my hot dog ________ I heard a familiar voice yelling at me from across the crowded school yard.
_____ hard I try, he just refused to listen to me.
She was angry only _____ they were late again.
Young people should go ____ working conditions are difficult.
On a peaceful summer day, he went to swim in the sea _____.
Those who have trouble _____ can grow crops vertically on trellises.