If you understand the passage but still get the questions wrong, the problem may be in answering rather than reading. Comprehension requires you to interpret what the question is asking, locate the right evidence, distinguish explicit meaning from inference, and express the answer precisely enough to match the demand.
Review wrong answers by type. Did you choose evidence that was true but irrelevant? Infer more than the passage supports? Miss a key word in the question? Copy too much without answering directly? Once the error pattern is visible, practise that answering skill rather than rereading the passage from the beginning every time.
Use the English Learning Hub for comprehension routes and the Diagnostics & Recovery Hub when the exact answering weakness still needs to be identified.