8. Don’t throw away the paper because I (not to read) ______ it yet. 9. Carol and I are old friends. I (know) ______ her since I (be) ______ a freshman in high school. 10. Maria (have) ______ a lot of problems since she (come) ______ to this country.

8. Don’t throw away the paper because I haven’t read it yet.9. Carol and I are old friends. I known her since I been a freshman in high school.10. Maria has a lot of problems since she come to this country.