Some instructors will allow you to retake a quiz. The quiz will show you if you are allowed more attempts.
Note: Your instructor may be using an upgraded quiz tool called New Quizzes in your course. If the quiz you are accessing displays differently, your instructor may be using New Quizzes. Functionality may differ between these quiz types. For help with retaking quizzes, please see How do I know if I can retake an assessment in New Quizzes?.