1. jack (arrived/has arrived) . he's in the living room. 2. look at the colour of the water! something (polluted/has polluted) the river. 3. scientists (have invented/invented) the digital camera in 1991. 4. we (saw/ 've seen) the new johnny depp film last night. 5. why isn't my mobile wotking? - i don't know. i (haven't touched/didn't touch) it. 6.(did you finish/have you finished) the washing up? shall we play cards now? )

1 has arrived 2 has polluted 3 invented 4 saw 5 didn't touch 6 have you finished

1. Jack has arrived . He's in the living room. 2. Look at the colour of the water! Something polluted the river. 3. Scientists invented the digital camera in 1991. 4. We saw the new Johnny Depp film last night. 5. Why isn't my mobile wotking? - I don't know. I haven't touched it. 6.Have you finished the washing up? Shall we play cards now?