Why do people have to take a series of tests in the passage?In order to get ______.

To get a driver’s license, you must take a series of tests. The first test is the vision test. This test cheeks your eyes to see if you have to wear glasses. The second test is a written test. It checks your knowledge of highway and traffic regulations. You can prepare for this test by studying a book. You can get the book at the driver’s license office. After you pass the written test, you receive an instruction permit. This permit allows you to practise driving with an experienced driver. The last test you have to take is a road test. This checks your driving ability. If you pass it, you will receive your driver’s license.