Analysis of test questions: This question requires writing an argumentative paper on food safety. The main points have been given in the requirements, so there are many places where we are required to play freely, but we just need to be careful not to leave the main points in the requirements. Before writing, we should carefully examine the questions, analyze the genre and determine the tense; Analyze the main points and list some basic words and phrases; Pay attention to the organization of expression and use conjunctions well; In order to enrich the literary grace of the article, you can use more complicated sentences. Finally, be careful not to make mistakes in grammar, syntax and collocation. After you finish writing, read it several times and modify it appropriately.

Comments: This question is more difficult, because it gives less information, and you need to sort out the materials yourself before solving the problem. You can make a brief outline as required, and then start writing. Sticking to the theme is the premise of good written expression.