Please help me correct my grammar of sentences below .

Thank you in advance !!

This is a public servant job, city government pays you salary, insurance and retiring pay. You don't fear that you're fired some day without warning and severance pay. That's why so many people participate the entrance exam which city government holds. If you pass it, you can take a job with US $ XXXX per month average. No wonder those people crowd the registration office for the exam.
This is a public service job; the city government gives you a salary, insurance and a pension. You do not have to worry that you may be fired without warning or severance pay. That is why so many people take the entrance exam which the city government offers. If you pass it, you can get a job with an average salary of US $ *** per month. No wonder people crowd the registration office for the exam.

I' ve got it !!

Thank you very much .