Time waits for no one.

One day, a teacher asked the students in the classroom, “Tell me, what is the fastest thing in the world?” Some said light, some said wind, and some said electricity. Then a mischievous student stood up and confidently said, “Sir, the fastest thing is exam time!” The teacher was surprised and asked why. He said, “It seems like the bell has rung before the exam starts. No matter how much I study, the exam time is over in the blink of an eye!” Hearing the student’s answer, the whole classroom burst into laughter. The teacher also laughed and said, “You are right, if you don’t understand the value of time, exam time really goes by the fastest.”