1 . We are warned by our teachers not to waste time because time _______ will never return. I think it quite _______. What does time look _______? Nobody knows, and we can’t see it or touch it and no _______ of money can buy it. Time is abstract, so we have to _______ about it.

Time passes very quickly. Some students say they don’t have _______ time to review their lessons. It is _______ they don’t know how to make use of their time. They waste it in going to theatres or playing, and _______ other useless things. Why do we study every day? Why do we work? Why do most people _______ take buses instead of walking? The answer is very ________. We wish to save time because time is ________.

Today we are living in the 21^st century. We ________ time as life. When a person dies, his life ends. Since life is short, we must ________ our time and energy to our study so that we ________ be able to work and live well in the future. Laziness is the ________ of time, for it not only bring us ________, but also does other ________ to us. If it is necessary for us to do our work today, ________ we do it today and not ________ it until tomorrow. Remember that time is much more ________.