Hello,Mr. Joe. Being your student,I get some steps to English-learning.Thanks a million, Joe! However,what troubles me in studying in our class is that I can't catch much enough from the whole knowledge. The main reason I really think is my preview.I have no idea to adapt to the preparation for our class,even I think it over. According to this,could you mind give me some advice about my preview? How can I do that will lead to effective on subjects? Hope your reply. I turly express my gratitude to you for your help.