1 . When I was a practice teacher in a middle school，the students in my class were always making ______，and had no interest in chemistry. So I decided to do ______to change their______ towards chemistry.

The evening before I would teach all by myself，I gave a piece of paper to everyone. I told them to write ______ they wanted on the paper and handed it in and then I could tell what each one had ______ .All the students said I _____ be longsighted(远视)．Then I stood ______ my back towards them. I didn't turn back ______ they had finished and ______ all the paper in a cardboard case.

I turned the cardboard case with the bottom(底部)towards the students，and told them calmly what each one had written on the paper. The students were surprised，______ that I had learned their ______ completely in such a short time.

I told them the truth and they were ______ at my brightness：there were five lines of students in the classroom，and every line had ten students. I had written serial number(from 1 to 50 )on every ______ of the paper in a chemical reagent(试剂)that cannot be seen ______eyes，and then gave ______out to the students according to the groups of their seats. After the paper was ______ in，I used______ chemical reagent onto the corner of the paper. Thus the serial number was ______！

______ ，the students became ______ interested in chemistry，and we became good friends.

2 . Wu Ming, a young German born after 1995, is a big fan of Chinese culture. As he thought some diseases can’t be treated _______ with Western medicine, he decided to _______traditional Chinese medicine (TCM). In 2015, Wu came to Henan province, where a strong TCM culture can be _______. After a year of learning, he _______ the language barrier and started to learn Chinese medicine. Wu always _______ some Chinese herbal medicine by himself to know their flavours and effects, just like Shen Nong, a character in Chinese legend. In Wu’s opinion, TCM is one of the best-preserved _______ of Chinese culture.

Studying TCM also _______ Wu’s mind and lifestyle. He used to be _______ to electronic devices, playing video games every night. Instead of being trapped in the fast-paced but unhealthy daily _______, he now lives a(n) ________ and peaceful life, practicing good habits like drinking tea and reading.

Wu ________ what he has learned to help his family. He always provides his family members with some advice about staying fit after ________ their skin or tongues online. Over time, his family gradually began to understand his ________ for TCM.

Wu thinks there’s no big difference between China and Western countries. “________ comes from being out of touch”, said Wu. He plans to run a traditional Chinese clinic in Germany, which could serve as a(n) ________ between the two countries and publicize TCM and its culture.

3 . Ten years ago when I was diagnosed with a serious illness, my first thought was, “Why me?” And this thought _______ me throughout my journey. It wasn’t until I was _______ enough to look back that I realized how much of my life was _______ by my illness not in a bad way.

Being _______ for our past experiences and _______ can be a hard thing to do. We sometimes wish events in our past could be _______ so we could start a new life. But without these events, we wouldn’t learn, change and grow.

The day I _______ this was volunteering with my boyfriend. A friend’s wife came up to me and asked me how school was, _______ I said I didn’t like it that much. She then _______ by saying, “Well, if you hadn’t gone, you wouldn’t have met him.” and pointed at my ________.

This really opened my eyes, and after I left I started seeing everything in my life in this ________. If I hadn’t gone to that school, I would never have met my future husband. If I hadn’t battled ________ the illness, I wouldn’t have found my true ________. At first I didn’t see how my illness could have ever been a blessing. But when I looked at it as an experience for me, I started to see that I had a lot to be thankful for.

I grew closer to my mother while ________. I gained knowledge about myself that I could ________ gain through struggle, and learned how to take care of my wants and needs in a way that made me happy.

4 . Scientists have discovered how plants manage to live alongside each other in places that are dark and shady. Plants in the deep darkness of a thick forest, where natural supplies are not very great in amount, won’t attempt to top their neighbors in growth as those in moderate (中度的) shade do. In deep shade conditions, it would be a waste of energy and harmful to survival because green shoots would never be able to top their larger neighbors in growth.

So how do plants prevent such growth in deep shade conditions? The secret lies in the clocks insides them, say scientists from the John Ines Centre and the University of Bristol.

They have discovered that when plants notice deep shade, this changes the expression of genes parts of the circadian clock (昼夜节律时钟) — the inner daily timer found in plants and other things. These clock parts perform an additional role in preventing plants from lengthening and overtopping neighbors.

The work identifies a previously unknown role of the circadian clock in controlling plant development and the findings may have possible effects on both natural plant populations and crops. Professor Antony Dodd of the John Innes Centre said, “The biological clock of plants plays a big part in their development and fitness. This work casts new light on a new role of the circadian clock in adapting plants to competition with other plants in their environments.” “It also gives us new insights into how plants adapt to very deep shade, where resources are very limited,” said Professor Kerry Franklin at the University of Bristol.

This work provides evidence for the firmness of the circadian clock in stressful environments, and information that may be useful in developing new generations of crops in a challenging climate.

5 . Most Famous Paintings in the World

Among the millions of paintings that are created and shown in galleries and museums all around the world, a very small number of them go beyond time and make history. Below are some examples.

The Persistence of Memory — Salvador Dali. Painted in 1931, The Persistence of Memory is one of the most recognizable pieces in art history. This work is known to make people reflect on their way of life and the way they spend their time, and it is also thought that Albert Einstein’s well-known Theory of Relativity gave Dali the idea for this wonderful painting.

Girl with a Pearl Earring — Johannes Vermeer. Considered by many to be “the Dutch Mona Lisa”, this beautiful painting features an unnamed young woman looking over her shoulder to stare directly at the viewer. It was completed in 1665 and is exhibited in the Mauritshuis in The Hague, the Netherlands.

Guernica — Pablo Picasso. The famous painting by Picasso was completed in 1937. It was painted in Paris following the bombing of Guernica during the Spanish Civil War. The painting is on permanent display in the Museo Reina Sofia, Madrid, Spain.

Starry Night — Vincent van Gogh. Painted in 1889, Starry Night is one of the most famous paintings in modern culture, which is part of the permanent collection of the Museum of Modern Art in New York. It is based on van Gogh’s direct observations as well as his imagination, memories, and emotions and was the inspiration for the song Vincent (also known as Starry, Starry Night).

6 . We all know what a brain is. A doctor will tell you that the brain is the organ (器官) of the body in the head. But a brain can mean so much more.

To tease is to make fun of someone. But a brainteaser is not one who makes fun of someone else’s brain. A brainteaser is a puzzle that makes you think.

To understand the next brain expression you first need to know the word “drain”. As a verb, to drain means to remove something by letting it flow away. So, a brain drain may sound like a disease where the brain flows out the ears. But a brain drain is when a country’s most educated people leave their country to live in another.

Next, we have a brainchild. A brainchild sounds like a really smart kid. But it isn’t. A brainchild is an idea that one has without any help from others. If you have a really great idea, it is your brainchild — no one else’s.

However, if many people are responsible for a great idea, you can say they brainstormed it. It is a process of thinking creatively about a difficult topic. For example, business leaders may use brainstorming to create new products.

But if you can’t find a solution to a problem, you may have to rack your brains. In this way, you may find a solution. Sometimes, you have to rack your brains, trying to remember someone’s name.

Now, if people are brainwashed, it does not mean their brains are nice and clean. To brainwash means to make someone accept new ideas by using repeated pressure in a forceful way. Keep in mind that brainwash is never used in a positive way.