1、 It’s my favorite, too.并无对比的前提条件，为何用too？
例如：We talked to her agent. He's your agent, too, right?
我们和她的经纪人谈过了。他也是你的经纪人，对吧？
2、Most of my classmates like it. So we always have partners.
这两句表因果关系，是一句话，去掉句号，小写so，或该用逗号。
3、You must focus on your gesture, your hands and your steps.
去掉第二第三个人称代词，注意不要用汉语表达习惯套用英语。再者gesture使用不当，它倾向于手势，某种特殊含义的表示，或肢体语言，引用维基百科原文证明,"Gestures include movement of the hands, face, or other parts of the body. Gestures allow individuals to communicate a variety of feelings and thoughts, from contempt and hostility to approval and affection, often together with body language in addition towords when they speak.
用posture更为恰当，例如，They instinctively gathered themselves into more tidy postures.她们本能地恢复了端庄的姿态.。