a disastrous oral speech

Last thursday our oral speech prctice presentation had posponed because our teacher was not feeling well. In that day we were very happy because we will not be a funny creature doing a oral speech that is not good or what they say a disgusting oral speech. This morning we did not bother to practice our oral speech so what happened was our teacher ask us to present after 10 minutes. We practice a bit but when it our return to do the presentation, we totally forgot our lines and our voices were not clear but according to our teacher, our gestures are unique and clear. what I learn is in able to prsent a good and perfect presentation, I should memorize my lines and do the proper phrasing.