When an ant dies, other ants take it out of the nest, often within an hour after its death. This behavior interests scientists and they wonder how ants know for sure—and so soon—that another ant is dead.
One scientist recently came up with a way to explain this ant behaviour. Dong-Hwan Choe is a biologist, a scientist who studies animals and plants. He found that ants have a chemical on the outside of their bodies that signals to other ants, “I'm dead—take me away” when it is dead.
But there's a question to answer: As we know, if an ant is dead, it stops moving. But when an ant is sleeping or knocked unconscious, it is also not moving. However, other ants don't move the living ant out of the nest. How do they know this ant is not dead? Choe found that ants have another chemical on their bodies, which tells nearby ants something like
, “Wait—I'm not dead yet”when 
it is not dead. Choe suspects that when an ant dies, the chemical that says, “Wait I'm not dead yet”quickly goes away. When other ants detect the“dead”chemical without the“not dead yet”chemical, they move away the body.
To test his theory , Choe and his team put different chemicals on ants. When the scientists used the “I'm dead” chemical, other ants quickly moved the treated ant away. When the scientists used the“Wait—I'm not dead yet”chemical, other ants left the treated ant alone. Choe believes this behavior shows that the“not dead yet”chemical overrides the“dead” chemical when picked up by other ants. And that when an ant dies, the “not dead yet” chemical fades away. Other nearby ants then detect the remaining“dead”chemical and remove the body from the nest.
Understanding this behavior can help scientists figure out how to stop ants 
from invading new places and causing problems.
57. What is the function of the first paragraph?
A. Leading the following paragraphs.
B. Showing the main idea of the passage.
C. Introducing the background of the passage.
D. Giving a summary of the passage.
58. Which of the following has the closest meaning to the underlined word “overrides” in the fourth paragraph?
A.is weaker than B. is stronger than C. is better than D. is worse than
59. What can we learn from the passage?
A. Living ants can also be taken away when they are not moving.
B. When an ant dies, it can tell others using a certain chemical.
C. A living ant can pretend to be dead using a special chemical.
D. Ants often use chemicals to communicate with each other.
60. Which of the following descriptions about Dong-Hwan Choe is right?
A. Choe did this study in order to stop ants from invading new places.
B.
Choe is a biologist who is only interested in animals, especially in ants.
C. Choe first came up with an idea to explain this ant behavior，and then did some tests to prove his theory.
D. Choe did the research on this ant behavior on his own
My grandmother Adele loved culture and was generous with its gifts. When I was a child, she took me to museums, restaurants, dances. She showered me with gifts from her travels around the world. But I can only remember her giving me one book ― a book that, to this day, I have not read. She presented me with her own favorite childhood book: Hans Brinker. My grandmother was happy to share this book with me. She even decorated the title page with her proud writing.
I tried to read it. I adored reading, and would dive into a new pile of books from the library all at once. But something about Hans Brinker just wouldn’t let me in. The story was set in Holland, a long time ago. It felt dull and unfamiliar ― even though I was a fan of classics of other times and places. I simply read the first pages over and over. I could not progress.
Standing on a bookshelf in our living room, the book was like something I avoided. It scolded me for not being interested, for not trying hard enough, for disappointing my grandmother.
The book started to fit in, almost forgotten, until Adele asked. Had I read it? Did I like it? Always determined, she wanted to know the answer. I would make some kind of excuse, feel bad, and open it again, hoping for a new reaction. The book weighed on me.
Years passed and finally Adele and I both accepted that I would never read Hans Brinker. Eventually I cleared the book from the shelf. The Hans Brinker experience led me to set a rule that I’ve lived by ever since: Do not ask about a book given as a gift. Don’t ask, despite your desire to discuss it to grow closer. The desire for such connection is what gives book-giving with special meaning ― and increases the owner’s possibility to be a letdown.
Guilt is basically the same as for all gifts, though. If the giver doesn’t have the pleasure of seeing or hearing about the gift being enjoyed, and asks whether it is, then the owner ― unless she can truthfully say “yes” ― either has to admit to not liking the present, or else lie on the spot. Neither is pleasant. So, don’t ask.When the author was a kid, his grandmother ________.
| A．took him to travel around the world a lot |
| B．loved to take him to museums and stores |
| C．shared her childhood stories with him |
| D．gave him many gifts |
What does the author think about the book his grandmother gave him?
| A．Boring. | B．Interesting. |
| C．Puzzling. | D．Disappointing. |
The underlined sentence “The book weighed on me” in Paragraph 4 probably means
________.
| A．the book is too heavy for the author to carry |
| B．the author feels stressful facing the book |
| C．the book is full of powerful viewpoints |
| D．the author keeps reading the book |
The author learns from the Hans Brinker’s experience that never ________.
| A．give others books as gifts |
| B．lie to people who give you gifts |
| C．get close to others through gifts |
| D．talk about the books given as gifts |
To Friend or Not to Friend
We all love our parents and turn to them when we’re in need, but would you like them to hear the conversations you have with your friends on the school playground or lunch queue? Social networking sites have become extensions of the school hallways, so would you add your parents as “friends” and allow them to view your online activities and conversations with friends?
In the past the generation gap included a technology gap, where children were up to date with latest technology and parents were left behind, content to continue their day to day lives as they always had because they had no need to know more about technology. However, more and more parents are beginning to realize just how important social networks are in their lives. This realization has given many parents the motivation to educate themselves about social networking sites.
These days many people are attracted to social networking sites because they can choose who they have around them; there’s also a certain amount of control over privacy that we don’t get in real life. Sometimes we feel that privacy is violated when we must accept a “friend” request from a parent or family member.
It’s a difficult choice whether or not to allow a parent to become a part of our online lives. On the one hand we don’t want to “reject” their request because that might hurt their feelings or make them feel you have something to hide. On the other hand if you do accept, then you could have a sense of being watched and no longer feel free to comment or communicate the way you did before.
A recent survey suggested that parents shouldn’t take it personally if their child ignores their request: “When a teen ignores a parent’s friend request, it doesn’t necessarily mean that they are hiding something, but it could mean that this is one part of their life where they want to be independent.”
Perhaps talking with parents and giving explanations would help soften the blow if you do choose not to add them to your friends list.From Paragraph 2, we learn that ________.
| A．parents feel secure about their privacy online |
| B．social networks successfully fill the generation gap |
| C．parents have realized the importance of social networks |
| D．social networks offer a platform for parents to communicate |
Teenagers may refuse a parent’s friend request because ________.
| A．they hide something from their parents |
| B．they are unwilling to be watched by parents |
| C．their parents tend to fall behind in technology |
| D．their parents make negative comments on them |
The passage is mainly about ________.
| A．privacy online |
| B．social networks |
| C．the generation gap |
| D．parents’ friend requests |
The passage is written mainly for ________.
| A．parents | B．teenagers |
| C．teachers | D．researchers |
Last week I did something that scared me. I stood in front of nearly 200 financial planners and I talked to them about why financial blogs are a good thing.
I’m a confident writer. I’ve been doing this long enough that I know my strength and my limitations. I’m less confident as a speaker. I don’t have time to pause to collect my thoughts. I’m not able to edit. I’m afraid of being trapped in a corner without being able to talk my way out. Basically, I’m scared to speak.
It would be easy to simply refuse the chances that come my way. When somebody asks me to speak in front of a group, I could say “no”. When radio and television stations call for an interview, I could say “no”. But for the past two years, I’ve been following my own policy to say “yes” to new chances.
To say “yes” is to live in fear. My goal is to continually improve myself to become better than I am today. One way to do that is to do the things that scare me, to take them on as challenges, and to learn from them ― even if I fail.
In mid-November, a local station asked me to appear on live television. “I realize it’s short notice,” the producer wrote, “but we’d love to have you on the show if you’re available tonight.” I was frightened. I thought about recent taped television interviews that I had hated. I was afraid of what might happen.
But I also thought about the things that had gone right. I thought of how my speaking skills had improved over the past year. And then I thought of the book I was reading, a book that I had bought for $1.29 at the local store. The Magic of Thinking Big was a huge bestseller during the 1960s. Written by Dr. David Schwartz, a professor at Georgia State University, the book contains dozens of practical tips on how to take risks to achieve big goals. Schwartz argues that nobody will believe in you until you believe in yourself.
So when the television producer asked if I wanted to appear on his show, I thought big. “Sure,” I said. “I’ll do it.” I acted confidently, but on the inside I was frightened. What I needed was techniques to build up my confidence and to overcome my fear.Why is the author afraid of speaking in public?
| A．He is aware of his potential. |
| B．He has few chances to talk. |
| C．He is not able to edit what he says. |
| D．He likes writing better. |
The underlined words “my own policy” in Paragraph 3 probably mean ________.
| A．self-improving through challenges |
| B．hesitating before chances |
| C．turning down the invitations |
| D．saying yes to fear |
The author mentioned the book The Magic of Thinking Big mainly because ______.
| A．it was inspiring |
| B．it was a bestseller |
| C．its author was famous |
| D．its price was attractive |
What is the author’s purpose to write the passage?
| A．To analyze his strength and weaknesses. |
| B．To give practical tips on speaking in public. |
| C．To persuade people to follow his example. |
| D．To share his experiences of overcoming fear. |
| Glendale City Parks Ranger Club Welcome to the Glendale City Parks Ranger Club. We are happy you have decided to volunteer to help keep Glendale City’s five parks clean and attractive. With assistance from local youth, Glendale City can continue to keep its parks beautiful all year long.
|
The Glendale City Parks can be the following EXCEPT ________.
| A．a picnic area for families to eat |
| B．a place for people to walk dogs |
| C．a place for teenagers to have classes |
| D．a playground for children to have fun |
In Sunnyside Park, the volunteer rangers’ duty is to ________.
| A．plant flowers |
| B．water the grass |
| C．paint the benches |
| D．check the equipment |
The park benches need painting in ________.
| A．Oak Hill Park and Valley Park |
| B．Valley Park and Blue Ridge Park |
| C．Sunnyside Park and Oak Hill Park |
| D．Mill Street Park and Sunnyside Park |
The purpose of the passage is to ________.
| A．attract tourists |
| B．explain park rules |
| C．find volunteer rangers |
| D．introduce park activities |
Koalas remind people of teddy bears. They have thick fur and large ears. Their broad, flat nose makes them look cute, similar to teddy bears. In fact koalas aren’t cute. They have sharp teeth and very sharp claws! Koalas are marsupials. This means the mother carries her baby in a pocket while it develops, similar to a kangaroo. The baby koala lives in its mother’s pocket for the first six months of its life.
The name “koala” comes from a native Australian word that means “no drink”. The koalas get almost all their water from the eucalyptus（桉树）leaves they eat. That’s where they get their food too. Koalas eat only eucalyptus leaves, and only the leaves of certain eucalyptus trees. The eucalyptus trees are where the koalas live. It’s also where they sleep. Koalas sleep about nineteen hours a day!
Why do they sleep so much? Some people think it’s because they’re lazy. But koalas aren’t lazy. They sleep so much because there isn’t much nutrition in eucalyptus leaves. Koalas store hardly any fat, so they must save their energy. One way to do this is to move slowly and sleep a lot.
After a day of sleeping they like to move around and eat just after sunset. They live alone most of the time. Koalas are very protective of their trees. If a koala sees another koala eating in its favorite tree, it might tell the other koala to leave by “barking” at it. Koalas do “talk” to each other. Besides barks, the males make a deep grunting sound. The mothers and babies talk in soft clicking sounds. If they get scared they may scream like a baby.According to the article, how are koalas and kangaroos alike?
| A．They both have thick fur. |
| B．They both have sharp teeth. |
| C．They both eat eucalyptus leaves. |
| D．They both carry their young in a pocket. |
The word “koala” comes from a word that means ________.
| A．no drink | B．moving slowly |
| C．large ears | D．barking loudly |
Why do koalas sleep a lot?
| A．Their babies need to get much rest. |
| B．They get tired from playing so much. |
| C．Their food does not give them much energy. |
| D．They do not like to be awake when it is warm. |
If an adult koala screams like a baby, he may get ________.
| A．worried | B．scared |
| C．hungry | D．sleepy |
