大家好！请允许我自我介绍一下
大家好！很高心认识您们你们(您们 is very uncommon. You needn't use it to show more respect for anyone, including your parents or your teachers.)！我是一位来自英国的男生，叫克里斯。我加入了italki是因为（or 我加入了italki，因为）我喜欢结交志同道合的朋友（In English, you can say "....because..." without a comma before 'because'. In Chinese, however, you must add a comma or '是' before '因为' unless '因为' is at the beginning of the sentence)。互相学习才还是最好哦！
Your pronunciation is pretty good, except for the tones of one or two characters. 卷舌音(Retroflex sound) is pronounced even better than a lot of Chinese people.
