Tick the correct sentences.

• If you heat ice, it melts.
• When winter comes, days will get shorter.
• If he had seen the red lights, the accident wouldn't have happened.
• If I suddenly caught a cold, I would stay in bed.
• If we had revised more, we would passed the exam.
• If they play well, they'll win the match.
• I haven't really decided, but if I get tickets, I'll go to a pop concert.
• We won't see the concert untill we will get the tickets.
• If I were you, I will take up tennis.
• If I were you, I'd take up football.