Write a sentence by quoting a famous saying as follows:

1. I once quoted Hugo, a famous French writer, in my homework, that the ocean is the widest in the world, the sky is wider than the ocean, and the human mind is wider than the sky. This famous saying tells people that one should have a broad mind. A person should have an open-minded measure, just like the sea, which contains infinite energy.

2. If we want to get good grades, we must study hard. There is a famous saying that there is a road to diligence in Shushan, and there is no limit to learning the sea.

3. Teacher Li teaches his students to be practical and realistic, knowing is knowing, not knowing is not knowing, and don't be ignorant.

4. As the ancients said, an inch of time is worth an inch of gold, but an inch of gold cannot buy an inch of time. So we should cherish the present time and study hard. Strive to improve their own quality and make unremitting efforts to become useful talents in the future.

5. During the celebration of this cultural festival, many foreign tourists came here, and China volunteers warmly received them. It was a great pleasure to have friends from afar.

6. Time flies, and the good times will never come back. Each of us has only one life, so we must cherish our life and seize the opportunity to work hard. A lazy youth, a lousy age. Only when you are young, you will be rewarded when you grow up.