Without plants, people cannot live. We eat plants. We breathe the oxygen (氧气) that plants _______. And we need plants _______ they make our cities and our life beautiful and colorful. That’s why even in big modern _______, we have parks full of trees, green grass and beautiful kinds of flowers. Also you are sure to _______ some plants and flowers in the rooms in every city.

But do you talk to your plants? Do you give them _______ and attention? The book The Secret Life of Plants by Peter Tompkins and Christopher Bird says that you should talk to them and give them love. The book _______ a very interesting test. Two seeds were planted. While the plants were growing, one plant was given much love and _______ ideas. However, the other plant was given neither of them, _______ unpleasant ideas. After six months, the loved plant was _______. Under the earth, it had more and longer roots, and above it were a thicker stem (树干) and more leaves.

Therefore, plants need our _______ and love as well as mankind. We should protect our plants so that we can live better with nature.

On a cold January morning, a man sat at a subway station in Washington D.C. and started to play the violin. He played for about 45 minutes.

Three minutes went by, and a middle-aged man stopped for a few seconds, and then hurried up to take care of his own things.

A minute later, the violinist received his first tip: a woman threw some money without stopping, and walked away.

Only a 3-year-old boy took the music seriously, going over, sitting down and soon losing himself in the wonderful performance. His mother wished to hurry along, but the kid kept looking at the violinist.

When he finished playing, no one noticed it. No one applauded (鼓掌).

No one knew this, but the violinist was Joshua Bell, one of the most talented musicians in the world. He had just played one of the most beautiful pieces ever written, on a violin worth 3.5 million dollars. Joshua Bell played the same music with the same violin and the seats each cost 100 dollars at a theatre two days before.

Joshua Bell’s playing in the subway station was a social experiment. It asks questions: in a common environment at a wrong hour, do we enjoy beauty? Do we stop to make a response (反应)? If we do not have a moment to stop and listen to one of the best musicians in the world playing the best music, how many other things are we ignoring (忽视)?

A hungry fly speeds through a forest. It smells nectar（花蜜）and lands on a green leaf. It starts to drink the sweet liquid（液体）. Suddenly, the fly’s world turns green. The two sides of the leaf close against each other. Long green teeth lock together around it. The fly has been caught by Venus flytrap. There is no way to run away alive.

The Venus flytrap is perhaps the most famous killer plant. However, scientists have only recently started to understand how it hunts（猎取）and eats. After years of study, plant scientist Alexander Volkov believes he now knows the Venus flytrap’s secret. “This,” says Volkov, “is an electrical plant.”

There are three small hairs along each of the Venus flytrap’s two leaves. When an insect touches a hair, it creates an electrical signal （信号） in the leaf. The insect can continue feeding—for now. But if it touches another hair within 20 seconds, the leaf traps suddenly shut. This allows the plant to tell the difference between a drop of water, for example, and a moving insect.

Once trapped, an insect has little chance of staying alive. Instead of nectar, the Venus flytrap now releases（释放）a different liquid—one that slowly eats away at the insect. Ten days later, almost nothing is left. The plant’s leaves open again, and the Venus flytrap is ready for its next meal.

Many of us have had the same “pleasant surprise”. After you mark a song as a favorite on a music app, it suggests songs of the same kind to listen to. In fact, this magic power depends on big data (数据).

Big data is a lot of sets of information that are put together so they can be used by a computer program. It can have different kinds of information from many sources (来源), such as information that comes from schools, companies, and governments. One set of data can have people’s names and addresses. Another set can have their likes and dislikes.

Big data can be used in many places. The government uses it to understand how many people travel on buses or trains. The information is then used to make bus and train systems better. Companies use big data, too. It helps them understand who buys their products. For example, one company uses weather data to see when people eat the most ice-cream.

Big data can be used for good reasons. Some hospitals use data to see if a baby who is born too early will get sick. The hospital can then take steps to take care of that baby. Big data can also be used for other reasons. It can be used to see which kinds of people are likely to break the law or hurt others.

Why can big data be used for good and bad things? Because the computer programs used to look at big data are written by people. They think in a certain way, so they build a model of those ideas. These ideas are then used to look at the data. Sometimes, these ideas are helpful for people or business. Other times, bad ideas can cause problems for certain groups of people.

51. 请用英语写一篇发言稿，把你的好习惯在英语课上分享给同学们。

I am here to share with you my good habits.______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________