英语：I am a Chinese girl who like country music and

英语：I am a Chinese girl who like country music and

在这里，who like country music and delicious food这定语从句是修饰 a girl的，所以应用三单，likes,才对

first, i think he should learn some chinese before coming to study in china. some common daily chinese will help him a lot when he studies in china, so that he won't have much trouble in living in china. second, i think he should try to learn the culture difference between china and his own country.he should know how the majority of chinese people live their life, what do they usually think, pehapers the most important is the way chinese teachers teach students.

who likes

没有，因为主语为第一人称，不必用三单

应该是who likes