Complete the semtences with the correct verb form ( present perfect simple and continuous, past perfect simple and continuous), using the prompts in brackets: 
a) I.........(just/see)the most incredible film!
b) How long......(know/have) your new car?
c) We......(know)our English teacher for a long time.
d) Sally was exhausted. She........( cook) all afternoon.
e) I was surprised to see Tom at the cinema as he.....(say) he couldn`t come.
f) We......( chat ) for a while when I noticed a smell of buring.