Michael, thanks for your explanation.

Hi Vera. Your English here looks good, but a little unusual. The first sentence is perfect. For the second sentence, you have a mismatch of number between "the illustrations" (plural) and "is one of my ..." (singular). This is OK if we assume that you have a project to do the illustrations for a new version of the Wonderful Wizard. But it might be better to express that clearly, to avoid uncertainty or the possibility of losing marks in an exam. So you might choose : "Now, doing the illustrations for The Wonderful Wizard of Oz is one of my favorite projects ever!"

Your text looks exactly the same)

So yah......I don't think that was a proper correction 😂