In the rice-growing world, the Chinese 1.(science), Yuan Longping, is a leading figure. Yuan Longping was born and brought 2. in China. 3. (educate) in many schools as a boy, he was given the nickname, “the student who asks questions”.
From 4. early age, he was interested in plants. He studied agriculture in college and as a young teacher he began experiments in crop breeding. He thought that the key to 5. (feed) people was to have more rice and to produce it more quickly. He thought he could do it by crossing different species of rice plant, and then he could produce a new plant 6. could give a higher yield than either of the original plants.
First Yuan Longping experimented with different types of rice. Then he began his search for a special type of rice plant. It had to be male and sterile. Finally, in 1970 a 7. (natural) sterile male rice plant was discovered. As a resultof Yuan Longping’s discoveries, Chinese rice production rose by 47.5 percent in the 1990’s.
In Pakistan rice is the second 8. (important) crop after w heat and will be grow n in many parts of the country. The newhybrid rice has been developed by the Yuan Longping High-tech Agricultural Company of China. Its yield is much greater than 9. of other types of rice 10. (grow) in Pakistan.
It is a blue, cotton shirt. The shirt belonged to my _______ David. On his birthday before he left college, his mother bought him the shirt. _______ I gave him free use of my bike, he let me wear the shirt, occasionally.
We shared the shirt, and as days _______, we shared more of our _______ . David was in school by scholarships and grants (助学金). He _______ to keep his scholarships, because without even one of them, he would have to _______and back on the farm. And in David’s home, there was always only enough money to cover the expense. His father died when he was twelve.
_______ David also talked about his father. Usually it was late at night, in the dorm just before bed, and the _______ always ended with tears that flowed from a river of memories and _______ : memories of a father suffering from ________ at a time when his son was just a teenager; longings for opportunities to cure his father ’s disease missed, because disease does not understand about the ________ between father and son. Nor does(do) ________ care.
Time ________ and we had to say goodbye to each other. After lots of hugging, and words of thanks, we eventually ________. It was on my ________ trip upstairs to our dorm that I saw a package on my bed. I ________ the w rapping paper. It was the blue cotton shirt in a box with a card ________ to it, reading:
Thomas, I can’t thank you enough for your ________ . This has been tough years and you have been ________ a friend. Thank you for listening. Thanks for everything.
David
I pushed aside the note, with ________ tears dropping on the shirt.
I still have the shirt today, though it has faded and wrinkled with age.
1.A. student B. brother C. roommate D. teacher
2.A. Because B. Unless C. In case D. Even if
3.A. went across B. went by C. ran out D. ran down
4.A. victories B. belongings C. scholarships D. stories
5.A. happened B. struggled C. refused D. failed
6.A. drop out B. stand out C. set out D. hold out
7.A. At a time B. At one time C. At times D. At the time
8.A. interview B. conversation C. discussion D. debate
9.A. longings B. apologies C. regrets D. wishes
10.A. failure B. depression C. poverty D. illness
11.A. distance B. cooperation C. connection D. difference
12.A. I B. she C. he D. it
13.A. went B. passed C. past D. flowed
14.A. fled B. departed C. met D. remained
15.A. first B. second C. next D. last
16.A. touched B. pulled C. removed D. folded
17.A. attached B. applied C. adjusted D. admitted
18.A. guidance B. friendship C. devotion D. mercy
19.A. less than B. other than C. rather than D. more than
20.A. angry B. joyful C. grateful D. sympathetic
If anyone had told me three years ago that I would be spending most of my weekends camping, I would have laughed heartily. Campers, in my eyes, were people who enjoyed insect bites, ill-cooked meals, and uncomfortable sleeping bags. They had nothing in common with me. 1.
The friends who introduced me to camping thought that it meant to be a pioneer. 2.We slept in a tent, cooked over an open fire, and walked a long distance to take the shower and use the bathroom. This brief visit with Mother Nature cost me two days off from work, recovering from a bad case of sunburn and the doctor’s bill for my son’s food poisoning.
I was, nevertheless, talked into going on another fun-filled holiday in the wilderness. 3. Instead, we had a pop-up camper with comfortable beds and an air conditioner. My nature-loving friends had remembered to bring all the necessities of life.
4.We have done a lot of it since. Recently, we bought a twenty-eight-foot travel trailer complete with a bathroom and a built-in TV set. There is a separate bedroom, a modern kitchen with a refrigerator. The trailer even has matching carpet and curtains.
5.It must be true that sooner or later, everyone finds his or her w ay back to nature. I recommend that you find your w ay in style.
A. Things are going to be improved.
B. This time there was no tent.
C. I was to learn a lot about camping since then, however.
D. The trip they took me on was a rough one.
E. I must say that I have certainly come to enjoy camping.
F. After the trip, my family became quite interested in camping.
G. There was no shade as the trees were no more than 3 feet tall.
Along the river banks of the Amazon and the Orinoco there lives a bird that swims before it can fly, flies like a fat chicken, eats green leaves, has the stomach of a cow and has claw s ( 爪) on its wings when young. They build their homes about 4.6m above the river, an important feature for the safety of the young. It is called the hoatzin.
In appearance, the birds of both sexes look very much alike with brown on the back and cream and red on the underside. The head is small, with a large set of feathers on the top, bright red eyes, and blue skin. Its nearest relatives are the common birds, cuckoos. Its most striking feature, though, is only found in the young.
Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip. Using these four claws, together with the beak (喙), they can climb about in the bushes, looking very much like primitive （远古的) birds must have done. When the young hoatzins have learned to fly, they lose their claws.
During the drier months between December and March hoatzins fly about the forest in groups of 20 to 30 birds, but in April, when the rainy season begins, they collect together in smaller living units of two to seven birds for producing purposes.
1.What is the text mainly about?
A. Hoatzins in dry and rainy seasons.
B. The relatives and enemies of hoatzins.
C. Primitive birds and hoatzins of the Amazon.
D. The appearance and living habits of hoatzins.
2.Young hoatzins are different from their parents in that .
A. they look like young cuckoos
B. they have claws on the wings
C. they eat a lot like a cow
D. they live on river banks
3.What can we infer about primitive birds from the text?
A. They had claw s to help them climb.
B. They could fly long distances.
C. They had four wings like hoatzins.
D. They had a head with long feathers on the top.
4.Why do hoatzins collect together in smaller groups when the rainy season comes?
A. To find more food.
B. To protect themselves better.
C. To keep themselves w arm.
D. To produce their young.
Self-driving vehicles will rely on cameras, sensors and artificial intelligence （AI） to recognize and respond to road and traffic conditions, but sensing is the most effective for objects and movement in the neighborhood of the vehicle. Not everything important in a car’s environment will be caught by the vehicle’s camera. Another vehicle approaching at high speed on a collision (碰撞) track might not be visible until it’s too late. This is why vehicle-to-vehicle communication is undergoing rapid development. Our research show s that cars will need to be able to chat and cooperate on the road, although the technical challenges are considerable.
Applications for vehicle-to-vehicle communication range from vehicles driving together in a row, to safety messages about nearby emergency vehicles. Vehicles could alert each other to avoid collisions or share notices about passers-by and bicycles.
From as far as several hundred meters away, vehicles could exchange messages with one another or receive information from roadside unit’s （RSUs） about nearby incidents or dangerous road conditions through 4G network.
A high level of AI seems required for such vehicles, not only to self -drive from A to B, but also to react intelligently to messages received. Vehicles will need to plan, reason, strategize and adapt in the light of information received in real time and to carry out cooperative behaviors. For example, a group of autonomous vehicles might avoid a route together because of potential risks, or a vehicle could decide to drop someone off earlier due to messages received, a foreseen crow ding ahead.
Further applications of vehicle-to-vehicle communication are still being researched, including how to perform cooperative behavior.
1.What is the first paragraph mainly about?
A. The reasons for the accidents by self-driving vehicles.
B. The research about applications for self-driving vehicles.
C. The importance of artificial intelligence of self -driving vehicles.
D. The reasons for developing communication between self -driving vehicles.
2.What does the underlined word “alert” mean in Paragraph 2?
A. Alarm. B. Condemn. C. Ignore. D. Govern.
3.What can we learn about roadside units (RSUs)?
A. They classify the vehicles on the road.
B. They can improve bad road conditions.
C. They take over the passing vehicles.
D. They serve as efficient information stations.
4.What is the best title for the text?
A. When do vehicles communicate?
B. The reasons why a high level of AI is important.
C. Vehicle-to-vehicle communication is coming.
D. What do applications for vehicle-to-vehicle communication need?
One cold day last November, my wife and I came home from work to a sick young daughter and we decided to stay at home for the night. Problem was, we had two tickets to see Miranda July, the performance artist, being interviewed at the Herbst Theatre. We decided to sell them online for ＄50. One hour before the event, a guy named Peter called me and said he wanted to buy the tickets. Since the time was limited, I told Peter to pay me the next day. Peter seemed touched and we said a fond goodbye.
However, a month later, Peter still didn’t pay me back. A few more weeks passed. Another month. There’d been one e-mail promising to mail the check, then silence.
Maybe he was having a hard time, I thought. But truth was, Peter seemed to be having a pretty normal time. According to the pictures and messages on his Facebook, he had been playing golf, dancing happily with his friends, and traveling on a boat. But he just refused to answer my calls, or reply to my e-mails or messages. So I tried reaching him with my wife’s phone one night. And he didn’t pick up when I called,but texted right back, playfully wondering who might be calling him.
“You should go to his office,”my wife said, “He would have to give you the money if all his coworkers were watching.”
But I didn’t want to become a debt collector. My efforts to reach Peter over these months had been light and I wanted to keep it that way. My initial exchange with Peter had been just two regular people agreeing to handle things humanly. There was a rare niceness in that, and I still wanted to keep that balloon in the air, however disappointing it was starting to look. I wanted to believe we could still trust each other.
1.For what reason did the author and his wife decide to sell the ticket?
A. They thought it was too cold that night.
B. They needed to look after their daughter.
C. They wanted to save some money.
D. They were going to be interviewed.
2.On the night the author sold his tickets to Peter, he________.
A. knew he might not get the ＄50. B. felt a little hesitant.
C. thought he could trust Peter. D. was moved by Peter’s kindness.
3.Why didn’t Peter pay the author back?
A. Because he didn’t remember it. B. Because he was too busy to pay.
C. Because he didn’t want to pay. D. Because he was having a tough time.
4.What can we infer about the author?
A. He would never trust strangers.
B. He might call the police for help.
C. He would go to Peter’s office to talk to him.
D. He still hoped Peter would pay him back.
