Va rog sa ma ajutati cu varianta corecta
1. What... when you saw the man? the police officer asked.
a) have you done
b) were you doing
c) are you doing
d) do you do

2. I know Lodon quite well because I ...... there.
a) used live
b) used to living
c) was used to live
d) used to live

3. Im tired because I ...... since eight this morning
a) have been working
b) work
c) am working
d) had worked

4. Is that Paul? He must ..... from Australia
a) return
b) had returned
c) have returned
d) returning