My friend David went far to work, so he asked me to take care of his yard in the mountains. He worked hard and always kept the yard________without any grass. But I was too lazy to sweep the fallen leaves, and I________plucked(拔)grass, allowing it to grow rapidly and freely. 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 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 David. He was________. After a while he said gently that 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 show their value.

Give the “grass” time to flower and give everybody a________to show his or her value. Don’t pluck a leave of any “grass” or negate(否定)a person easily and how many “rare orchids” we will get in our lives!

The film My People, My Country hit Chinese cinemas to celebrate the 70th anniversary of the founding of the People’s Republic of China last year. According to general director Chen Kaige and six other directors, the film focuses on national memories and tells ordinary Chinese people’s stories.

Many of us don’t pay much attention to the importance of eye care. It is said that if you take care of your body, then you can surely be healthy. That is why our eyes should be given a lot of care. Natural eye care should be put in the first place.

There are several causes leading to poor eyesight like not eating enough food, genes（基因）and aging（老化）.

Televisions, computers and reading are also the causes of having poor eyesight. If you happen to work in front of a computer, you’d better take a break every once in a while.

Something dirty can cause redness and it will make you feel uncomfortable. It is bad for your eyes, too. If this happens, the best way is to clean your eyes by using cold water. You must also try your best to protect your eyes from harmful things. For example, sunglasses are not just for fashion but they can also serve as a great way to protect your eyesight from UV rays.

Eating healthy food will do good to your eyesight. Remember that vitamins A, C and E are good for eyes. Try to eat food groups that have these vitamins. And you should do eye exercises because they protect your eyesight, too. If a person exercises regularly（定期地）and eats the right kind of food, his eyes will stay in good condition for a long time.

All above are natural ways of eye care that help us keep healthy eyes. Being happy all the time can be helpful to a person’s eyesight, too. In a word, eye care is very important, no matter how old a person is.

For as long as humans have appeared, we have been the most intelligent species（种类）on Earth. Monkeys know how to use simple tools. Elephants can be taught how to count. But things like art, literature（文学）, the Internet, and space travel have only been made possible by the amazing intelligence of humans. And yet, there are some who believe that we can create machines that can think and feel just like we do. Artificial intelligence（人工智能）, or AI, is defined（定义为）by Merriam-Webster as “the capability of a machine to imitate intelligent human behavior”.

AI is around us every day. From Apple’s voice-activated assistant Siri to the software algorithms（算法）that shipping companies use to deal with deliveries（投递）, AI is very much a part of our lives.

But why do we put so much effort into creating machines that can think the way we do? For one thing, AI can make our lives much easier. Imagine being able to be in a car, tell it your destination, and sit back in comfort as the AI-guided self-driving car takes you there. We’re already getting there—Changsha became the first city in China to roll out self-driving taxis in April 2020.

However, there are risks. What if we somehow produced an artificial intelligence that was smarter than us? How would it behave toward us? These are the kinds of difficult questions that AI researchers ask themselves all the time.

Apart from the risks, it is already clear that AI is here to stay. Only time will tell if it will lead us into a new age of prosperity（繁荣）, or be our end.

Being friends with someone does not mean that you agree with everything he does. Sometimes, you might disagree so strongly with the way a friend behaves that you want to mention it to him. You may find it so hard to talk to your friend. It’s important to know some tips on how to make the talk friendly and effective(有效的).

Ask yourself what changes you expect. If you plan to tell your friend to change, you need to lay out examples of what you expect him to change first. This may be that a friend is dishonest, too lazy, or sometimes he interferes(干扰)with your personal space.

Know why you want these changes. Are these changes for your convenience, for your friend’s well-being, or a necessary factor(因素)in continuing the friendship? You need to be ready to open up and give him the truth. For example, you can express how bad you feel and what will happen if your friend makes a change.

Pick the right time and place to talk. You should have this talk in person if possible. Pick a time when neither of you are too stressed and meet somewhere that you won’t be interrupted(打扰).

Talk to your friend calmly. Try to communicate your feelings to your friend without blaming(责备)him. When you talk, don’t raise your voice to your friend.

86. “谁知盘中餐，粒粒皆辛苦。”节约粮食是中华民族的传统美德，即使如今人们生活富足，我们也应当提倡节俭，避免浪费食物。某英文网站正在开展以“拒绝食物浪费”为主题的征文活动，假如你是李华，请用英语写一篇80词左右的短文投稿，谈谈你的看法。

Food waste has become a big problem these days. It_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________