Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions.

If you're currently in secondary school, you may be interested in getting a job during your summer break. However, you may not know how to find a summer job. Here is some useful advice for you.

Firstly, you should find out when your school will close for the summer. Then you should plan to apply for jobs two to three months before the start of your summer break. This can help ensure that you have a job already lined up when summer arrives. After that you need to learn about the types of jobs that are available. For example, find out whether there are full-time or part-time jobs, and whether they require previous experience or training so that you can feel confident about applying.

Secondly, you should prepare an application letter for the job you want to apply for. In the letter, you should explain why you want the job and provide more details about the experiences or skills listed on your CV. You may have to change each application letter for every specific job to increase your chances of moving further in the hiring process. For example, your application letter for a shop assistant may highlight different qualifications than the one for a home tutor to a young child.

Lastly, you should prepare for the job interview. If an employer is interested in hiring you, they may ask you for an interview. Before the interview, prepare for some questions that the interviewer is likely to ask you, such as why you want the position and what relevant skills you have. On the day of the interview, bring printed copies of your CV and application letter in case the employer wants to review them. You should also wear a professional outfit and try to be positive and friendly during your interview.

The word 'one' in paragraph 3 refers to _____.