Спасибо за помощь:)
1. Tom cut himself while he __ (make) breakfast.
2. A mechanic __ (repair) our car now, we have to call a taxi.
3. How many languages ___ (speak) in China?
4. How long __ you (know) Steve before you married him?
5. When my grandmother was young she __ (live) in Argentina.
6. Pete seldom __ (forget) about birthdays.
7. He __ (not/ see) his brother for nearly a year.
8. When we arrived, we __ (greet) warmly by the receptionist.
9. The store __ (open) at exactly 9 a.m. by the manager tomorrow.
10. He is confused. He __ (try) to solve this problem all morning.