Do the foll owing t hree main point s: 1 find out t he weak. Review process i s to sum up the knowledge on t he one ha nd, make the knowledge m ore cohere nt system and reg ularity, but al so let the students t hemselves, look s up the deficien cies. So, we tea chers to understa nd t he student s ' knowl edg e of the situati on prior to t he review, students not only found wi despread deficie nci