22. Which camp may a painting lover attend?

A. Art Camps at Art School of San Francisco Bay.

B. The Culinary Dude Winter Break Camps.

C. GrowFit Sports Camp.

D. Trackers Earth.

23. How is Trackers Earth different from the other three camps?

A. It teaches kids how to cook.

B. It improves kids' artistic skills.

　C. It includes many sports activities.

　D. It opens to a certain age group.

24. On which day is Grow Fit Sports Camp open to kids?

A. Jan. 2, 2019. B. Jan. 5, 2019. C. Dec. 28, 2018. D. Dec. 26, 2018.

　　A team of scientists has come up with a plan to help rebuild the Arctic (北极)ice cap.

Usually, the sea ice gets thicker and spreads further each winter, but this hasn't happened for the past few years.

Last month, the ice cap had reached its smallest size since scientists began keeping record of it 38 years ago. The weather in the Arctic has been unusually warm this winter. Some days, temperatures have been 20 degrees Celsius higher than before at this time of year. With less ice, the Arctic would warm up even more quickly, and more ice would melt (融化). Without sea ice, many animals would lose their natural homes.

Dr. Steven Desch and a group of scientists from Arizona State University in the United States think they can help to build up Arctic sea ice again. They want to fix wind- powered pump(抽水机) on the sea ice. During the winter, the pumps would spread water from the ocean over the surface of the ice where it would freeze and form a new layer of ice. The scientists say that in 10 years, this could add a metre of ice to the ice cap. (The Arctic ice cap is about two to three metres thick right now.)

The plan would require about 10 million pumps and it would be very expensive-about $655 billion. Some other scientists are wondering if the pumps would actually work in cold Arctic conditions. They are also worried about how the project might affect the environment.

Dr. Desch and his team hoped their plan would get more people interested in looking for a solution to the problem of melting sea ice. He said the only plan people have right now is to try to cut greenhouse gas emissions (温室气体排放) from cars and other man-made sources. He and his team don't think that will be enough to save the sea ice, but hope it will get everyone moving in the right direction.