In view of the fact that reviewing the oral part takes up a lot of time, you can only do the last few sets of a whole set, that is, the one that contains the size and chart questions, that is, the one that contains all the questions that may appear in the real exam.

After finishing the last few sets, you will have a basic grasp of mathematics.

Other parts, unless you review verbal better, can be used for recreation when you are bored. You don't have to read all the big books.