(Originais Teachy 2024) - Question Easy of English

In a small town, the local high school is organizing a science fair where students have to present experiments that involve both the principles of physics and the use of the English language. John, a senior student, is working on a project to demonstrate the relationship between the current passing through a conductor and the voltage applied to it. As part of his presentation, John needs to explain the steps of his experiment and the scientific concepts involved using proper English. Which modal verb should John use to express the necessity of following the experiment's steps in a precise order, considering the safety and accuracy of the results?

In a global conference call, you, as a representative of your country, are introducing your team to the other participants. You want to mention each team member's role by using possessive pronouns and the genitive case in English. One of your sentences is: 'The project of John is dealing with software development.' How can you rephrase this sentence more appropriately to demonstrate the use of possessive pronouns or the genitive case?

Let's imagine you are in a city where everyone speaks English and you want to know people's professions. How would you ask in English 'What is your job?' to someone? And if someone asked you, how would you respond that you are a 'teacher' or an 'engineer' in English?