Good luck to you, any chance you were able to get any info on those missing two questions about farmers attitude towards technology ? I tried googling it, but seems like these listening tests can be brand new with every exam and not available on any internet sources like Reading passages.Correctness is assumed with number of people supporting one answer/response.
You get band 8 if you have 35-36 answers correct. Banding in detail here. If you have 35 correct, be assured you have secured 8 in Listening.
I too have 34 correct answers, the rest I do not seem to remember my choices or 1-2 are wrong.