The questions to ask are:
What is this paragraph mostly about?
Are there any unfamiliar words I need to learn?
What is the author’s claim?
How does the evidence relate to the claim?
Is the evidence relevant to the claim?
It is important to identify what the paragraph is about; the claim it is making as well as the evidences and how these evidences that support the claim. In addition, it is also important to have a full understanding of the vocabulary used in the paragraph.