The reason for this problem is because people memorise particular phrases to use to increase their score. You are marked on your ability to adapt sentences and phrases to the particular task and issue, not memorise generalised phrases to get a higher score. One phrase suits all issues isn’t going to work in a language test. Another problem is that students think if they learn a particular phrase this will give them a chance for a higher score. The aim of this lesson and advice is not to rely on learned phrases to boost your score.