1. (It is not snowing)
2. (I am sitting on a chair)
3. (I am eating)
4. (I am not studying history)
5. (It is not raining)
6. (The Sun is shining)
7. (Somebody is laughing in the hall)
8. (I am learning English)
9. (I am listening to the teacher)
10. (My group mates are doing the exercise)