【答案解析】The poem reminds me of an old proverb: never put off what you can do today until tomorrow. We must learn to cherish today and do whatever we plan to do at this moment. We have three days in our life: yesterday, today and tomorrow. Today is the only day we can grasp. What we experienced in yesterday, glory or disappointment, with time passing by, could never stay around. Although tomorrow might be bright in our vision, it comes from today and is thus decided by what we do today. Only by cherishing today can we have a glorious or successful tomorrow, jus as the poem said: "today the seed/tomorrow the grain/today the planting/tomorrow the gain." We should sow cautiously so that we can harvest abundantly. Many students put off their homework that they can do today until tomorrow. They have no plan for their work and time. As a result, they could not accomplish their goals in the end. For example, some students failed the TEM4 because they always idle away their time and lag behind the course schedule. In a word, today is the most important for us. Once it's gone, we would never see it again. If you are ambitious for a bright future, take action promptly and cherish today.