What does it mean to improve your weakness in Reading or Listening?
Every time you choose the wrong answer, it is because there is something that you don't understand or you misunderstand.
If you understood everything perfectly, the correct answer would be obvious and easy to choose.
The key to increasing your score is discovering what weakness is causing you to not understand or misunderstand and then improving it.
For example, you might get MCQs in Listening wrong because you can't read the options and listen to the speakers at the same time. Until you can read and listen (and understand!) at the same time, you will continue to choose the wrong answers.
For example, you might get MCQs in Reading wrong because you can't skim. Step 2 in Chris' strategy for MCQs in skim the text to get the general meaning. If you can't skim, then can't master the strategy. You won't improve until you've mastered the strategy.
If you need help discovering or improving your weakness in Reading or Listening, use the Recorded Live Reading or Live Listening lessons to see how the teacher applies the strategy. That can help you understand where you are going wrong.