Look at these extracts from essays and use words from A in the vocabulary section to improve their style, making the underlined words more formal.

1. The response from the public really shows us the importance of having a full investigation of the facts.
2. This view of the world was originally laid out by the Ancient Greek philosophers.
3. It is not easy to find the reason for the fall in population of these birds.
4. Economists have said there might be a link between exchange rates and a general lack of confidence in the European Union.
5. I should like to say again here that the issue is not one that can be easily resolved.
6. The recent events are the best example of the dilemma faced by politicians the world over.
7. In a 2010 article, Charles Plestow said with great certainty that the whole European Medieval era had been misinterpreted.
8. The lecturer briefly repeated the main arguments of her talk at the end.