1. My sister … (work) in the hospital.
2. We … (found) this company ten years ago.
3. We … (write) letter to our parents yesterday.
4. It … (be) hot tomorrow.
5. My grandmother … (have) a bad headache yesterday.
6. My parents … (visit) me in the clinic.
7. We sometimes … (make) mistakes.
8. They … (work) together next year.
9. Yesterday I … (do) my homework and I … (play) football.
10. The nurse … (clean) and (air) the wards every day.