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Exercise 2: Find ONE mistake and correct it in the sentences below.
1. I just have cut my hair.
2. She hasn't working as a teacher for almost 5 years.
3. The lesson haven't started yet.
4. Has the cat eat yet?
5. Has Jack finished the project already?
6. He has been at his computer for 7 o'clock.
7. She hasn't received any good news since a long time.
8. My father hasn't played any sport for last year.