Questions are there to test your understanding, so they use various techniques. In multiple choice questions, for example, they often use information that is half right or close to the text, but that is not enough. They can use words from the text in wrong answers, which tests whether students are reading carefully, or using recognition instead of comprehension. They offer choices that are logical and correct, but dso not reflect the content of the text.
I would also suggest that you practise writing ordinary English, not using the abbreviations, etc, that you use here. If you get used to using ordinary English, you'll probably find that you comprehension improves too.