This advice is for someone who may have the same question.
I think you should download some mock exams, there're a lot, one of the problems with the reading is not the comprehension itself the problem is that you can answer the questions based on the reading, there're techniques. I encourage you to take a deep read about how the tests works, that's what I did.
I took the test 2 years ago, so I dont have it fresh in my mind, but as far as I remember:
The first reading is all about scamming (you can find dates, names, etc just doing a fast scan of the text), they're measuring if you are able to find information in a lecture.
The second reading will need a little bit more, you will be asked for information that maybe will not be at the same sentence, for example: Bob and Mary had 3 children, 1 of them leave the country, the question will be something like: "How much kids are with Bob and Mary?" easy... 2
The final reading (I think they're 3), is about full understanding of the text, you will read something and will be asked for deeper questions like: Is the phyllosophy really important in the context of the lecture?
What I used, and was good for me, is to download some test assesments, read them and answer the questions, fill the gaps and start all over again till I got a 100% in those tests, after that I got a 8 band at reading. Sometimes you will not able to get a 100% score even in your own language, so the problem is not with the English at all, the problem is with how good are you reading (even in your language).
Hope this helps, and good luck with the test.