I am speaking very slowly and articulately, but when I do the speaking questions, the computer has great difficulty recognizing what I say and then retaining it long enough to make a sentence out of it. I know my accent isn't that bad! Please advise.
You could try a set of headphones with built in mic which usually helps with dictation.
However my experience of the speaking exercises are very mixed. I have said words correctly and been marked incorrect and other times I have spoken total garbage which was marked OK.