Write a multi-choice question for the following article: Article: Think of life as a game in which you are playing with five balls in the air. You name them work, family, health, friends and spirit and you keep all of them in the air. You will soon understand that work is a rubber ball. If you drop it, it will bounce( )back. But the other four balls, family, health, friends and spirit, are made of glass. If you drop one of these, they will be broken. They will never be the same. You must understand that and try to have balance in your life. How? Don't look down on your worth by comparing yourself with others. It is because we are different and each of us is special. Don't let other people set goals for you. Only you know what is best to yourself. Don't give up when you still have something to give. _ Don't be afraid of difficulties. Be brave! Don't run through life so fast that you forget not only where you have been, but also where you are going. Don't be afraid to learn. Knowledge is a treasure you can always carry easily. Don't use time or words carelessly. You can't get them back. Yesterday is history, tomorrow is mystery , and today is a gift; that's why we call it " the present". Life is not a competition, but a trip ,step by step.
Question: Why can't we use time carelessly?Options:A Because time is expensive.B Because time will get back.C Because we are too poor.D Because time never returns.Answer:D