IELTS Reading Tip no.37: 25/40
If you keep scoring less than 25/40, it means that you have terrible English. Practice is just going to waste your time. The reason you are not getting the marks is that your overall English is too weak and you should give yourself ample time to do a Basic English course which would last for at least 6 months. There are two things which could have happened either you did not study properly or your school did not teach you properly.