Uzupełnij zadania stosując Present Perfect lup Present Perfect Continuous:

1. ...................(you/open) the box yet? Yes, I ............ (already/do) it.
2. I can't stand this noise any longer. They .................... (cut) the hedges for three hours now!
3. Mike .................. (write) postcards all evening. He..........(write) ten so far.
4. We................ (not finish) papering the walls yet. We ................ (do) the job for five hours now.
5. The operation is still in progress. It ............... (go on) since ten a.m.
6. I ............ (not find) my briefcase yet although I ............... (look for) it since morning.
7. How long ............ (they/discuss) the financial matters now? The conference started at two and it ............. (not end) yet.
8. What .............. (you/do) out there? Your clothes are dirty all over.