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.
1 Historical review: Some topics are better understood if a brief historical review of the topic is presented to lead into the discussion of the moment. Such topics might include "a biographical sketch of a war hero," "an upcoming execution of a convicted criminal," or "drugs and the younger generation." Obviously there are many, many more topics that could be introduced by reviewing the history of the topic before the writer gets down to the nitty gritty of his paper. It is important that the historical review be brief so that it does not take over the paper.