1. I haven't cutted->cut my hair since last June.
2. She has not working->worked as a teacher for almost 5 years.
3. The lesson haven't->hasn't started yet.
4. Has the cat eat->eaten yet?
5. I am worried that I hasn't->haven't still finished my homework yet.
6. I have just decided to start working next week.(đúng)
7. He has been at his computer since->for seven hours.
8. She hasn't received any good news since->for a long time.
9. My father hasn't played any sport for->since last year.
10. I'd better have a shower. I hasn't->haven't had one since Thursday.
1. cutted => cut
2. working => worked
3. haven't => hasn't
4. eat => eaten
5. hasn't => haven't
6. next week => since next week
7. since => for
8. since => for
9. for => since
10. hasn't => haven't