On Toefl test, I have a problem with the reading section, can you please help me?

How to prepare or some toefl tricks. I have a problem with the reading section can you give some good advice on how to practice on the reading section. It's not that i don't know how to read, it's just that some really hard to understand articles make me confused, because when I read and I understand the article I know how to answer the questions, but as you know most of them are complicated.