Do 38 sets, but summarize your own methods after you finish, and be sure to do it next time. Same or similar questions can't be wrong.

So do people in China. You can search online for the analytical methods and answer formats of Chinese reading comprehension, then make 38 sets, correspond the answers with the answer patterns, and then supplement and improve the answer routines.

I think we can ask the teacher. They are experienced and definitely better than the advice given online.