My friend Richard went far to work, so he asked me to take care of his yard in the mountains. He worked hard and often kept the yard_______without any grass. But I was too lazy to sweep the fallen leaves, and I_______pluck (拔) grass, allowing it to grow rapidly. In the early_______, in March, the leaves were green and soft. A month later, when the leaves spread quickly, I discovered they were like wild orchids (兰花) in the forest.

As the summer came, the "grass" really flowered. The flowers looked like those forest orchids,_______they were yellow, unlike those purple or brown red forest orchids. I picked one flower, then went to find a friend who studied_______.As soon as my friend saw it he asked me_______I picked it. "It's amazing!" He_______explained, "This kind of orchid is hard to find. Now it is worth at least 10,000 dollars each."

I told the good news to Richard. He was_______. After a while he said gently, he saw the orchid in the yard every year, but he thought it was common grass, so he always plucked it. He said, "If I could_______, it would flower a few years before." Yes, all of us might miss some rare(稀有的) orchids in our own lives. We don't give them the time to flower to prove their value.

Give the "grass" time to flower and give everybody a________to prove his value. Don't pluck a leave of any "grass" or negate (否定) a person rudely and how many "rare orchids " we will get in our lives!

AI(人工智能)makes our lives easier and better. Let's see the amazing AI.

My name is Sam. I joined a club called "passing help" last month. Now let me tell you why I joined it.

One evening this May, on my way home my old car broke down (出故障). It was 25 miles from my home. I wanted to get a ride, but there was no car. It was also hard to take a taxi. I decided to take a bus home. I went to a bus stop nearby.

After a while, a bus came but it did not go to my town, the bus driver was a young woman. She was kind and she told me which bus I should take. I waited there for about thirty minutes. But no bus came. At last a car came to me and a woman came out of the car. She was just the bus driver.

"When I reached the bus station, I got to know that the bus to your town couldn't come, so I returned here. I just can't leave you here." she said, "Get in my car and I will take you back to your home."

"It is a long way." I said.

"Come on, Sir, "she said, "Let's go".

On the way she told me a story. A few days ago there wasn't gas (汽油) in her car. An old man drove her up to a gas station and then back to her car.

When we got to my home, I wanted to give her some money to thank her. But she didn't accept it. "I only want to help others and do something nice for somebody. Pass it along," she said.

Once upon a time a little leaf was heard to cry, as leaves often did when a gentle wind passed by. The twig (小枝) asked, "What's the matter, little leaf?" The leaf said, "The wind just told me that one day it will pull me off!" When the tree heard this, it swung all over and promised the leaf, "You will not go till you want to."

The sunny days of the autumn came. The little leaf saw all the leaves around becoming very beautiful. Some were yellow, some were red, and some were in both colors. The little leaf asked the tree what it meant. The tree said, "All these leaves are ready to fly away, and they have put on these beautiful colors because of joy."

The little leaf wanted to go, and grew very beautiful in thinking of it. When it was very bright in color, it saw the branches (树枝) of the tree had no color in them. The leaf asked, "Branches, why are you brown?" "We must keep our working clothes on. Your clothes are for holiday, because your tasks are over," said a branch.

Just then a little puff of wind came, took the leaf up and turned it over and over. The little leaf was like the fire in the air, and fell down silently among hundreds of other leaves. It began to dream — a dream so beautiful that perhaps it would last forever.

You might have noticed that sometimes, when you're playing mobile games or making a video call, the picture suddenly freezes (卡顿) because the network speed is too slow. When you try to download a movie on your phone, it seems to take forever.

These annoying things will soon become things of the past, as China just issued commercial licenses (发放商业牌照) for 5G networks on June 6. This means that China's telecommunications (电信) companies will be able to offer 5G network speeds for mobile phone users.

The "G" stands for generation (代). 1G let us talk to each other, 2G let us send messages, 3G gave us mobile data and Internet, and 4G made all of these things faster. So what will 5G bring?

First of all, 5G is so fast that it will allow us to download an entire HD movie in a second. The delay (延时) between sending and receiving data will be shortened. Now, 4G takes about 100 to 200 milliseconds (毫秒), while humans have a reaction time of about 200 to 300 milliseconds. But 5G will get the delay down to 1 millisecond or less, which is almost real-time.

Because of this increase in speed, it will possible to create and use new kinds of technology. Robots will be used to do operations because doctors will be able to control them from somewhere else without any delay. Self-driving cars will be able to drive more safely because they can smoothly communicate with other cars, traffic lights and road sensors (传感器). 5G also makes the Internet of Things (IOT, 物联网) possible.

All in all, 5G will shape every type of technology that it touches. And you won't have to wait too long for that to happen.