• on time
  用于表示航班准点，会议准点，也就是说这个时间是固定的
  e.g. Peter wants to start the meeting on time.

• in time
  表示的时间点是deadline, the last moment before you do sth
  e.g. Peter wants to finish the meeting in time.

• 几种询问职业的方法

• what do you do?

• what's your job?

• what kind of work do you do?

• what do you do for a living?

回答

• I‘m a doctor.(描述一种职业)
• I'm in banking.(描述一种领域)
• I work for Google.(雇主，公司名称)
• I work as a web designer.(描述一种职业)