People all over the world use colorful little squares of paper to help them remember something. Some people even use them to create works of art: These little squares are called Post-it Notes. One of their creators, Spencer Silver, recently passed away at 80.

Silver first started working on the notes in 1968, when he was working for technology company 3M. He discovered a kind of weak glue (胶) that didn’t leave behind any residue (残留物) when it was taken off. ★ But he and his partner Art Fry came up with the idea of putting the glue on small pieces of paper to create notes that could be easily moved from one place to another. They borrowed some yellow paper and went to work on their creation. The Post-it Note was finally born in 1974.

However, it wasn’t brought to market until 1977 and didn’t really take off until 1980. Today, it is one of 3M’s best-selling things. The company makes more than 50 million Post-it Notes every year. Silver, a creative chemist, had 37 inventions during his time at 3M. He was included into the National Inventors Hall of Fame for his achievements.

These days, Post-it Notes are made in many different colors. sizes and shapes, including fruit and animals. They are useful for many things. You can use them to take notes, mark your place in a book, give someone a reminder, or even ask someone to a dance. You can even see them in the Museum of Modern Art in New York.

When I was ten years old, my teacher once asked me to make a speech titled “A Real Test in My Life”. Just i    51     how terrible nervous I was at that moment. To talk in front of the whole class meant many eyes would focus upon me! I felt     52     (real) worried.

I had no other     53     (choice). So I was to draft (起草) the speech. That was just a piece of cake for me, because I was a good writer. But the hard part lay in my oral presentation (口头陈述): to read     54     the paper was not allowed. I had to give the speech from my memory and in front of so many people!

A real test b    55     when I stood on the platform (站台), with my legs trembling and my mind blank (空白). How much time had p    56     by, I didn’t know. I tried to c    57     myself. My listeners were still     58     (wait) for me, without any signs of rushing me. Gradually I began to give out my speech, with great difficulty

It seemed to be a hundred years. When I finished, I was s    59     to find my audience cheering for me. I made it!

Now I am a great speaker. Looking back, I learned a lot: sometimes we get into t    60     just because of fear, overcome it, then we will succeed .

61. 朋友是我们成长过程中必不可少的陪伴者。请根据以下内容提示问题，用英文从目的、 内容、意义等方面来写一篇关于友谊的文章。 内容提示问题：

Friendship

Friendship is both a source of pleasure and a part of good health.