Have you ever splashed (溅洒) water onto your shirt right before an important event? Usually, clothes become darker in color when they get wet. It would certainly be nice if the water didn't change the color of the clothes so much. But sadly, this isn’t how things work. So why do clothes often appear darker when they get wet?

Before understanding this question, we should first take a quick look at how we “see” colors. Take a red shirt as an example. When it’s hit by the light from the sun, it takes in different wavelengths (波长) of light, except the red light wavelength. The red light wavelength is reflected to our eyes. That is why the shirt appears red to us.

Now let’s return to the wet shirt. When the light hits a wet shirt, it has to pass through the water on the shirt. The light that should be reflected by the shirt is re­absorbed (再吸收) by the water. This means less light will be sent to our eyes. As a result, the shirt looks “darker”．

But remember, sometimes a wet shirt can seem brighter when viewed from a certain angle (角度). The surface of   the   shirt is usually rough. Adding water to it makes it smoother. A smooth surface reflects light in a different way from a rough surface. Thus, you may see a small and bright reflection of the light from a certain angle. So basically, a wet shirt will be darker than a dry one, but it can also appear more “shiny” at times.

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Bi Sheng was born in Song Dynasty. He lived in a small village which lies in Huanggang today.He invented the printing around 600 AD (公元)。He was the world’s first inventor of the printing. It is about 400 years earlier than the printing in Germany.

The printing is also called the movable type printing (活字印刷).But how did it work in the past?

First of all, the clay was made into movable types. Then words were engraved (雕刻) carefully onto the types. After that the words were chosen and put in right order in a box according to the text. Next, the workers brushed ink onto the movable types. Finally the types could be used for printing. They could be used again and again for different books.

The movable type printing plays an important role in Chinese culture. With the help of it, Chinese culture spread around the world more quickly. At the same time, the movable type printing was widely used in the world at that time. As a result, more and more culture communication among countries took place.

The movable type printing, the compass (指南针)，gun powder and the paper-making are called four great inventions of China. They make China own an important and even top position in the history of human civilization (文明).

Time management is the greatest challenge for me in high school. I have to take good care of my subjects, activities, social life and the rest. I was often angry with my family members just because I didn’t plan my time well. For example, I might shout at them for troubling me when I was working. And sometimes I might say something bad to them when I missed deadlines, even if it was actually my fault for cramming everything in (把……堆积起来) at the last minute.

As time goes by, I realize that time management is very important in our everyday life. The best advice to deal with time management is “break it into bits”. It’s really important for you to learn how to break a big project into small, manageable tasks. Then you can work progressively and have a sense of achievement whenever you’ve done with a small part.

Another piece of advice is to make a timetable for yourself. It doesn’t have to be the one that you follow completely. It’s just there to serve as a guide. You can compare your actual timetable with the planned one to see how well you actually use your time. The final suggestion is to always set deadlines for yourself.

A little girl thought she was not as beautiful as other girls, and nobody liked her. So she was always unhappy and didn’t like to talk to others. H    51    , one day, her mother gave her a beautiful hair clip (发夹). When she wore it, she looked much     52     (pretty) than before. She decided to wear it to school.

On her way to school, she found that everyone who     53     (see) her smiled at her. Most of her     54     (schoolmate) said “hello” to her, and this was the     55     (one) time they did so. She thought that the beautiful hair clip had brought     56     (she) them.

In the evening she went back home     57     (happy). Her mother asked her, “Did you know you     58     (drop) your hair clip? I found it by the door this morning.”

She understood that she hadn’t worn the hair clip to school at all. It is not important     59     we wear or how we look. The most important is what we think     60     ourselves.

66. 法国作家雨果曾说“进步，才是人应该有的现象”。回首三年的初中时光，你在学习和生活中一定取得了不少的进步，比如学科知识、生活技能、人际交往、体育锻炼、良好习惯等方面。请结合自身的亲身经历谈一谈自己的进步。

I have made progress