It's a good idea to practise writing short, fast introductions. If you can write the introduction quickly, you will have more time to focus on the main paragraphs - these are the key to a high score.
Here's a question that someone asked me about:
In many cities, security measures, such as the use of video cameras in public places, are being increased in order to reduce crime, but some people believe that these measures restrict our individual freedom.
Do the benefits of increased security outweigh the drawbacks?
Here's my short, fast introduction:
It is true that the security in many cities has been tightened in recent years. Although I agree that some security measures can feel restrictive, I believe that there are more benefits than drawbacks.
- In reality, it might not be true that security has been increased in most cities, but I think we have to accept this in order to answer the question.
- The question gives us an example of increased security (video cameras), so we can definitely use that example in a paragraph about the drawbacks.
- Notice that my introduction paraphrases the question. I've used some of the words from the question, but there are some nice changes too (e.g. tightened, feel restrictive).