【答案解析】Life does not always give us everything we want; therefore, it is not possible that we will be successful all the time. However, no matter how hard the present life is, we shouldn"t miss the happy moments in life. We must have our dreams. As we have dreams, we will have a clear purpose to live with. A life with a goal is a happy life. Wherever we are and whatever we do, we must be very hard-working, as no lunch is served for free.