___ you don’t try hard enough, you will find it difficult to learn a language., if , unless, ___ the snow doesn’t melt, we’ll go skiing next week., unless, if, We may go swimming ___ the water isn’t too cold., if, unless, ___ you know Ann, I’ll introduce you to her., if, unless, ___ the snow melts, we’ll go skiing next week., unless, if, ___ you don’t know Ann, I’ll introduce you to her., if, unless, We may go swimming ___ the water is too cold., if, unless, Paul won’t win the marathon ___ he doesn’t train hard., unless, if, ___ you try hard enough, you will find it difficult to learn a language., if, unless, ___ you don’t know the meaning of this word, look it up in your dictionary., unless, if, Paul won’t win the marathon ___ he trains hard., if, unless, ___ you appologise, I’ll never forgive you., unless, if, I’ll catch cold ___ you close the window., if, unless, ___ you know the meaning of this word, look it up in your dictionary., unless, if.

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