I can confirm that you can't copy and paste from the question because I tried it during my exam. Not certain about from one WC to another, but I was able to copy and paste within the same WC. Since they are free text fields, you might be able to copy and paste the text you've entered between WC questions.
AUD - 81 BEC - 83 FAR - 75 REG - 75
Great things never come from comfort zones - Roy T. Bennett