firstspeaker,good hand gesture, good opening with a clear presentation organization, don't need to emphasize every word, good
pronunciation, can be more natural by speaking more fluently, second speaker,nervous, worried about the script,not natural,
repeating the same vocabulary, pauses, third speaker,very low voice, forget the script, mumbling, repeating vocabs, no eye contact, look at the floor, memorizing script, forth speaker, nice and clear but too short, need to extend the talk, fifth speaker, shaky voice, a bit nervous, loud and big tone of voice, not bad, need to make it more natural.