Each of the following sentences has one mistake, identify it

Each of the following sentences has one mistake, identify it. 1. Unluckily, we won the game although we practiced a lot. => Answer 1 Question 5 2. His team promise that they should win the match next summer. => Answer 2 Question 5 3. Can you say the difference between a sport and a game? => Answer 3 Question 5 4. In my spare time, I play a lot of running. => Answer 4 Question 5