It is well known that everyone has his own dream as well as his own future. But do you know what future really is? I have to say that future is now. That is to say, we must treasure every minute now. If we want to have a bright future, we should know how important time is and use it well.
There is an old English saying, “Gain (得到) time, gain life.” Then what’s time? Time is something that we can’t see or touch, but we feel it passing by. Time is always with us. When we are at table, time passes; when we play, time goes by unnoticeable. We always say “Time is money”, but time is even more precious (珍贵的) than money, because when money is spent, we can make it back. But if time is gone away, it will never return. So, some of us even say time is priceless (无价的).
We should always remember: future is now. For us students, we should try our best to work hard in order to create a great future of our own. We should make the best use of every hour and be the master of today. We should do everything before us as well as possible. And never put off (推迟) what can be done today till tomorrow.
As we all know, “Time and tide wait for no man.” If you waste today, you will regret tomorrow. So from now on, work hard. Tomorrow will be better, and your future will be brighter. Remember: “No pains, no gains.” Today’s hard work is the cause of tomorrow’s harvest.
根据短文内容，选择最佳答案。
小题1:If we want to have a bright future, we should .
A. know the value of time and make every minute useful
B. feel time passing by
C. understand that time is always with us and we can waste it
小题2:The word “unnoticeable” means in Chinese.
A. 随意的 B. 不引人注意的 C. 慢慢的
小题3:Time is more valuable than money because .
A. past time will return no more
B. time can’t be seen or touched
C. time is always with us
小题4:From the passage, we know .
A. when money is spent, we should make it back
B. we can put off what can be done today till tomorrow
C. today’s hard work leads to tomorrow’s harvest
小题5:What is the best title for the passage?
A. A Bright Future B. Time and Monday C. Future and Today
，其中C为常数，k=l，2，…，则X的数学期望E(X)为 ( )．
(C) 1． (D) e．