I noticed that many of you did not ask any question at the end of each presentation. I know you have a lot of burning questions in your head but it would take too long to compose those questions in English. If you are aware that the difficulty you have experienced is hard to overcome, my advice is to check your understanding of the sentence structures in English. You can start from choosing a few simple affirmative sentences to change into questions. I will spare a small portion of our class time to discuss this with you.
Presenters of the upcoming presentations should practice giving your talk over and over again to avoid excessive anxiety and clumsiness in the actual presentations. Keep learning.