i studied it before.here is a piece of advice
firsr of all, do not read books, listening and watching the vcd, again and agian, ususally, about 3 times each unit until you feel that is the most you can understand
then, read the unit , underline the things you think are important, and read the explanation
finally, do the exercise
以这个方式一个单元一个单元的攻克是非常好的
提问者对于答案的评价::)