1 . Elephants have a good memory and they can recall the smell of a relative even after a decade apart.
When Franziska Horner and her team
Franziska
When they encountered faeces from
Such reactions may be linked to positive emotions, the researchers say. “That was amazing and intense,” says Franziska. “We were sure they did
“I am not surprised that elephants have memories, especially in social contexts, that
| A．heard about | B．worried about | C．gave up | D．lined up |
| A．tastes | B．entertainments | C．efforts | D．memories |
| A．ignored | B．separated | C．abandoned | D．observed |
| A．once | B．until | C．while | D．because |
| A．cleaned | B．mixed | C．collected | D．adjusted |
| A．presented | B．lent | C．awarded | D．recommended |
| A．in addition to | B．in advance of | C．in contrast to | D．in case of |
| A．frightened | B．trained | C．unprotected | D．unrelated |
| A．sample | B．note | C．picture | D．voice |
| A．hardly | B．rarely | C．repeatedly | D．secretly |
| A．species | B．reasons | C．situations | D．reactions |
| A．remember | B．agree | C．exist | D．research |
| A．finding | B．moving | C．smelling | D．touching |
| A．proud | B．cruel | C．unsafe | D．unhealthy |
| A．wait | B．last | C．waste | D．take |
2 . There are many interesting science experiments out there for young kids. You can surprise your friends and teachers with them. All you have to do is to put a little effort into it and you should have no problem coming up with an interesting science experiment. One such experiment is to show your friends and teachers that you can make mothballs (樟脑丸) dance!
If you want to do it, first, be sure that you have got all the necessary science kits(工具箱) for your science experiment.
What you need for this experiment is a glass filled half full with water. Add a little bit of vinegar to your glass of water, about 1/3 or 1/4 of a cup (60 ml), and one teaspoon (10 ml) of baking soda, and then carefully stir the mixture. Drop a few mothballs into the glass and have your audience watch. As long as the surfaces of the mothballs become fairly rough, they should begin to bounce（弹起） up and down in the glass.
You can also do a similar experiment with raisins (葡萄干) and clear pop, such as Sprite. In this experiment, all you have to do is to fill a glass with Sprite and drop a few raisins into it. The raisins should begin to bounce up and down in the glass of Sprite. You can also replace the raisins with mothballs and you should get the same effect in the Sprite. This project works because the irregular surfaces of the mothballs and the raisins hold some CO2 bubbles (气泡) ,causing them to bounce up and down in a dancing motion.
1. The writer writes this passage to ________.| A．explain why some science experiments are easy |
| B．encourage people to spend more time on science |
| C．tell us how good he is at doing science experiments |
| D．teach kids how to do an easy and interesting science experiment |
| A．Producing mothballs. |
| B．Dancing mothballs. |
| C．Changing mothballs. |
| D．Swimming mothballs. |
| A．mothball | B．kind of vinegar |
| C．drink with bubbles | D．special kind of raisin |
| A．why Sprite has some CO2 bubbles |
| B．what people usually use Sprite for |
| C．what scientists usually do with raisins |
| D．why the mothballs bounce up and down |
3 . Nalini Nadkarni didn't play with Barbies as a girl. She was busy climbing the trees with unlimited energy in her yard in Maryland.
The forest ecologist might seem an unlikely person to help design and promote Barbies. But she's been inspiring girls worldwide to play with dolls having magnifying glasses (放大镜) and boots. It's through new explorer Barbie dolls designed with her input by Mattel and National Geographic. The dolls, including a conservationist, a biologist and a nature photojournalist, are long overdue, said Nadkarni, a biology professor. "As a child, I created my own fun by tree climbing. I could picture the treetop as a place of rescue, or as a hospital for wounded birds. It was my world, and I could be anything in it," she said.
In 2003, she thought of ways to further fire girls with love for science. “I asked myself, ‘What do girls care about when little?’ ” Nadkarni said. She looked to her young daughter. "I knew girls wanted to play with and look like Barbies. But what if Barbies had field clothes on and came with a little book about plants?"
She contacted Barbie-maker Mattel and was told that a "treetop Barbie" wouldn't sell, but she insisted. She finally created her own treetop dolls. Mattel agreed she could produce the dolls on a small scale (规模), and Nadkarni sold about 400. Last year, Nadkarni was thrilled to learn National Geographic worked with Mattel to come up with a line of adventure dolls, and that they wanted her to serve on their advisory committee.
Since sales began, Nadkarni has heard from girls coast to coast, thanking her and asking questions about how they can make a difference to help trees, "I love climbing trees and learning all I can about them. But getting children excited about protecting forests is one of the most important things I have done, " Nadkarni said.
1. Which words can describe Nadkarni as a child?| A．Clever and considerate. | B．Adventurous and lonely |
| C．Active and imaginative. | D．Enthusiastic and outgoing. |
| A．To show her love for forests. | B．To update the images of Barbies. |
| C．To inspire people to protect nature. | D．To get girls more interested in science. |
| A．Surprised. | B．Uninterested. |
| C．Dissatisfied. | D．Favorable. |
| A．A biology professor sells her own Barbies |
| B．Explorer Barbies have become a new fashion |
| C．Nadkarni has turned to making the treetop Barbies |
| D．A forest ecologist helps create explorer Barbies |
