Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.
Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades. We've been going to the same spot in the Pacific Ocean, and we try and characterize long-term change in the open ocean environment. And one of the key things that we measure is CO2 levels. And we've been able to record this increasing quantity of atmospheric CO2 into the ocean.
Scientists expected that as atmospheric CO2 increased, more and more of the carbon dioxide would be absorbed into the ocean, affecting the chemical balance of the sea water, with a potentially harmful impact on shellfish and coral in particular.
"As carbon dioxide dissolves（溶解） in the water, or seawater in this case, it forms a weak acid, carbonic acid," Dore explains. "And therefore, as the concentration of CO2 in the atmosphere goes up and that exchanges with the surface seawater, it drives the PH down, and makes it more acidic."
The seawater Dore and his colleagues have analyzed confirms what the theory predicts.
The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO2 and then moved to those depths. Or there could be a biological explanation.
"It's important to realize that the oceans are really becoming acidic. And it can have negative（消极的） impacts on a whole variety of sea life from fish to coral. It's potentially catastrophic."What can be the best title of the passage?
| A．Sea Life Facing Danger |
| B．Scientist Researching Seawater |
| C．Oceans Becoming More Acidic |
| D．Climate Change Affecting Seawater |
With the increase of atmospheric CO2， .
| A．more corals will appear in the sea |
| B．the surface water is becoming warmer |
| C．the chemical balance of the seawater is affected |
| D．the PH of the ocean out here has been increasing |
Which of the following shows the process of the impact of atmospheric CO2 on sea life?
a．Sea life is endangered．
b．CO2 goes into the surface water．
c．The ocean chemistry is affected．
d．CO2decreases the PH and makes the seawater more acidic．
e．CO2 levels in the atmosphere go up．
Scientist Robert Dore came to the conclusion based on .
| A．his research and analysis |
| B．the expectation of other scientists |
| C．some former theory |
| D．a major cause of climate change |
Once when I was facing a decision that involved high risk, I went to a friend. He looked at me for a moment, and then wrote a sentence containing the best advice I’ve ever had: Be bold and brave — and mighty (强大的) forces will come to your aid.
Those words made me see clearly that when I had fallen short in the past, it was seldom because I had tried and failed. It was usually because I had let fear of failure stop me from trying at all. On the other hand, whenever I had plunged into deep water, forced by courage or circumstance, I had always been able to swim until I got my feet on the ground again.
Boldness means a decision to bite off more than you are sure you can eat. And there is nothing mysterious about the mighty forces. They are potential powers we possess: energy, skill, sound judgment, creative ideas — even physical strength greater than most of us realize.
Admittedly, those mighty forces are spiritual ones. But they are more important than physical ones. A college classmate of mine, Tim, was an excellent football player, even though he weighed much less than the average player. “In one game I suddenly found myself confronting a huge player, who had nothing but me between him and our goal line,” said Tim. “I was so frightened that I closed my eyes and desperately threw myself at that guy like a bullet (子弹) — and stopped him cold.”
Boldness — a willingness to extend yourself to the extreme—is not one that can be acquired overnight. But it can be taught to children and developed in adults. Confidence builds up. Surely, there will be setbacks (挫折) and disappointments in life; boldness in itself is no guarantee of success. But the person who tries to do something and fails is a lot better off than the person who tries to do nothing and succeeds.
So, always try to live a little bit beyond your abilities — and you’ll find your abilities are greater than you ever dreamed.Why was the author sometimes unable to reach his goal in the past?
| A．He faced huge risks. |
| B．He lacked mighty forces. |
| C．Fear prevented him from trying. |
| D．Failure blocked his way to success. |
What is the implied meaning of the underlined part?
| A．Swallow more than you can digest. |
| B．Act slightly above your abilities. |
| C．Develop more mysterious powers. |
| D．Learn to make creative decisions. |
What was especially important for Tim’s successful defense in the football game?
| A．His physical strength. |
| B．His basic skill. |
| C．His real fear. |
| D．His spiritual force. |
What is the author’s purpose in writing this passage?
| A．To encourage people to be courageous. |
| B．To advise people to build up physical power. |
| C．To tell people the ways to guarantee success. |
| D．To recommend people to develop more abilities. |
Getting away for a short time always seems like a great idea—until you have to pack. The rule is: pack light. Here are some tips to help you pack.
Organize Yourself
Make a list. Think of what you need from your head to your toes. When you’ve done this once, it’ll be easier next time.
Start Small
Consider buying small-size samples of shampoo, toothpaste, and other items at your local store. Make sure they are all sealed tightly.
In an emergency, you can purchase them at your destination. But remember that the time you spend buying things at your destination will reduce your visiting time.
The Clothing Dilemma
Choosing which clothes to bring is probably the hardest packing decision to make. Think once again from head to toe — hat, shirts, jeans, sneakers, etc. Once you’ve picked out what you want to bring, think carefully. Do you really need that extra pair of jeans? If so, fine. Don’t try to fool yourself. You are the one who will be left holding the bag.
Weather is an important factor in your packing. If it’s cold, you could wear a jacket, a sweater, a regular shirt, and a T-shirt. Layering up will keep you warm and it will leave more room in your bag. Roll up your casual clothes instead of folding and laying them flat. This leaves more room to pack other things, and keeps your clothes fairly wrinkle-free.
Remember how much easier it will be to carry your bag!This text would be most helpful to a reader who is _______ .
| A．going on a vacation | B．shopping for luggage |
| C．moving to a new home | D．hosting relatives for a visit |
If you buy things at your local store ahead of time, you can _______ .
| A．lighten your load |
| B．save a lot of money |
| C．have more visiting time |
| D．have more room in your bag |
What should one plan to do if going somewhere in the winter?
| A．Pack an extra sweater for the trip. |
| B．Put on several layers of clothing. |
| C．Mix and match clothing outfits. |
| D．Roll jackets so they fit in the bag. |
John sent his mother expensive presents on his mother's birthday every year. He liked to show her how rich he was. "I must find something wonderful for her, and it must be the only one in the whole world. Then my mother must be very happy.” John thought. He advertised (登广告) in the newspapers. “Wanted—the best present for the woman who has everything. "
For many days his telephone did not stop ringing. People phoned him from all over the world. They wanted to sell him "the best present". But they did not have anything that was the only one in the whole world.
Then less than a week before his mother's birthday, a man came to his office. He was carrying a cage, and in the cage there was a large bird.
"This bird, "the man said, "can speak ten languages and sing any pop song. There is no other bird like it in the world. "
"I will listen to it, "John said. “If what you said is true, I will buy the bird from you.”
The man spoke to the bird. "Talk to me in French, " he said. The bird spoke to him in French. "Tell me a joke in Japanese, " he said. The bird told him a joke in Japanese. "Sing a famous pop song, "he said. The bird sang a famous pop song.
"I'll buy it, "John said. "How much do you want?"
"One hundred thousand dollars, "the man said. This was a lot of money but John paid him. Then he sent the bird to his mother with a birthday card.
The day after his mother's birthday he phoned her. "Well, mother, "he said, "Is the bird wonderful?"
"Oh, it was delicious, dear, "she said.Why did John send her mother expensive presents for her birthday every year?
| A．Because he loved his mother very much. |
| B．Because his mother needed these presents. |
| C．Because he wanted to show he had a lot of money. |
| D．Because he was the richest man in the world. |
How did people know John wanted the best present in the world?
| A．They rang John up. |
| B．They knew it from the newspapers. |
| C．John phoned them one by one. |
| D．They knew it on TV. |
Why did John pay the man a lot of money for the bird?
| A．Because it was such a beautiful bird. |
| B．Because he wanted to help the poor man with the bird. |
| C．Because the bird could look after his mother. |
| D．Because he thought the bird could make his mother happy. |
What does the sentence "It was delicious, "really mean in the story?
| A．His mother ate the bird. |
| B．His mother let the bird fly away. |
| C．His mother began to learn languages from the bird. |
| D．His mother thought it was the most expensive present in the world. |
I had recently arrived in London and I wanted to see some of the famous places. Should I go to the seaside? Or maybe one of the famous parks? I walked along the street, past a kindergarten playground, and suddenly saw an underground railway station. I was surprised because it was not on my map. I went to buy a ticket. The ticket-seller looked very old. He gave me a ticket, said "Remember it's a return", laughed and walked away without taking my money. Was it special for tourists?
A train arrived. I could not see any other passengers. I got on and the doors closed. I suddenly felt I should not have got onto the train. It started to go faster and faster, shooting along the tracks. As it entered the tunnel, everything became as dark as midnight and I do not remember the next few minutes. The train came to a station and I got out. I could see light shining in the distance so I walked towards it and came to a door. Beyond it there was a busy street.
There were lots of English people walking about, and I could see some of the famous buildings of London, but there was something wrong. The people's clothes were strange. There were no cars, no motorbikes—but there were horses everywhere. Was someone making a film?
“Excuse me,” I said to a man. “Would you mind telling me where I am and what is happening?”
“What do you mean? Who are you? Where do you come from? Are you from China? This is London and everyone's going to work. Can't you see that?” he asked.
“Thank you, sir. I'm sorry, but could I look at your newspaper?” I asked.
“You can have it,” he said as he walked off.
I looked at it; I saw “New Bicycle Law” and above that “July 5, 1880”.
Maybe I should have walked around, but I ran back to the door. I waited a long time. I was very afraid. A train came. I got on. It took me back to the first station. As I left, a woman asked, “What were you doing in that abandoned station?” I had no answer, but I still had the newspaper in my hand.Why was the author surprised at the beginning of the story?
| A．Because he suddenly saw an underground railway station. |
| B．Because he walked past a kindergarten playground. |
| C．Because the ticket-seller looked very old. |
| D．Because he couldn’t find the station on his map. |
What does the underlined “it” in the second paragraph most probably mean?
| A．The train. | B．The light. |
| C．The distance. | D．The door |
Why did the author think he had arrived in a film-making scene?
| A．Because he could see some of the famous buildings of London. |
| B．Because he had done something wrong in the street of London. |
| C．Because he could only see horses rather than cars in the streets. |
| D．Because the people in the streets were all neatly dressed. |
According to the passage, New Bicycle Law might be _______.
| A．The name for a London street. |
| B．The name for a film made in London. |
| C．The name for a newspaper article |
| D．The name for a underground station. |
Where can this passage most probably be taken from?
| A．In a storybook. |
| B．In a math textbook. |
| C．In a travel guidebook. |
| D．In a scientific experiment report. |
Many teenagers(青少年) feel that the most important people in their lives are their friends．They believe that their family members don’t know them as well as their friends do．In large families, it is quite often for brothers and sisters to fight with each other and then they can only go to their friends for some ideas．
It is very important for teenagers to have one good friend or a group of friends．Even when they are not with their friends, they usually spend a lot of time talking among themselves on the phone．This communication is very important in children’s growing up, because friends can discuss something．These things are difficult to tell their family members．
However, parents often try to choose their children’s friends for them．Some parents may even stop their children from meeting their good friends．Have you ever thought of the following questions?
Who chooses your friends?
Do you choose your friends or your friends choose you?
Have you got a good friend your parents don’t like?
Your answers are welcome．Many teenagers think that ____ can understand them better．
| A．friends | B．brothers | C．sisters | D．parents |
When teenagers have something difficult to tell their parents, they usually____．
| A．stay alone at home |
| B．fight with their parents |
| C．discuss it with their friends |
| D．go to their brothers and sisters for help |
The sentence (句子) “Your answers are welcome．” means _______．
| A．You are welcome to discuss the questions with us |
| B．We’ve got no idea, so your answers are welcome |
| C．Your answers are always right |
| D．You can give us all the right answers |