阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。
A
When scorching for something fun and educational to do in Maryland, why not visit the Maryland Science Center? It is located at 601 Light Street, Baltimore. The ticket prices vary depending on ages, groups and the exhibits you choose. Click here for more information.
The Maryland Science Center is basically a museum, but it gives everyone a chance to learn through experience and play, rather than just glance at an exhibit.
Activities
You can learn about various topics, including outer space, the human body, dinosaurs，electricity，marine（海洋的）biology，energy，and much more. You can also take part in the interactive activities, such as racing bubbles, digging for dinosaur fossils, using puzzle pieces to construct cars, and so much more.
The Davis Planetarium（天文馆）
At the Davis Planetarium, you can be back in a chair and look at the stars while still inside the Science Center. The stars will appear on the ceiling of the theatre as you watch them.
There are different shows to catch at the Davis Planetarium. You can learn about the galaxy and astronomy during the Dark Matters show. Learn about the stars and planets during the Sky Live show. The One World One Sky show allows children to explore the stars. The Live from the Sun show will teach you all about the hot sun.
The Kids Room
For children, they can't miss the Kids Room. They will be able to play in a water are a, construct dams and water towers, push buttons, ring doorbells, build with blocks, and more, and definitely they will learn a lot. In addition, there is also an area for kids of two years old and under, where they can crawl, walk and explore safely with soft toys.
21.If you want to know why the sun shines, which show should you choose?
A.The Dark Matters show.
C.The Live from the Sun show.
B.The Sky Live show.
D.The One World One Sky show.
22.What do we know about the Maryland Science Center?
A.It charges different prices for adults and kids.
B. It is regarded as the most popular museum in Maryland.
C. It is a museum where there are many famous exhibitions.
D. It is mainly designed for children and their families to play together.
23.Where is the text probably taken from?
A.A travel plan.
C.An educational magazine.
B.An academic column.
D.An online advertisement.
