阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
Monthly educational subscription boxes for students can be a great way to develop an interest in a particular subject. If you want to learn something at home while having fun, you can have educational subscription boxes delivered monthly straight to your house.
Spangler Boxes
Spangler Boxes feature a range of hands-on scientific experiments designed by Steve Spangler,who previously hosted a popular science education program on News for Kids Projects focus on STEM—science,technology,engineering and math Examples of projects include exploring lava（岩浆）science，the sound waves，and physical laws.
Finders Seekers Boxes
After receiving a Finders Seekers Box, you'll explore characters of a new city and culture every month while solving puzzles. Think of a Finders Seekers Box as an escape room challenge that takes place in your living room. Clues and online research tools are available to help in case you get stuck solving the mystery.Each puzzle takes approximately two to four hours to complete.
Creation Boxes
Creation Boxes teach students electronics, digital tips and high-level problem-solving. Each box teaches a lesson and is progressively more challenging. A sampling of the projects includes a mood lamp, an electronic memory game, and a distance detector using an ultrasonic sensor（超声传感器）.
Kiwi Doodle Boxes
Kiwi Doodle Boxes are among the most popular boxes on the market. They feature a variety of themes customized to students aged from 8 to 18 and focus on art and design with projects such as a felt botanic garden,an artificial leather sample set, and a handmade soap. These projects introduce students to new crafting materials and techniques and all craft supplies are included in the box.
21. What did Steve Spangler use to be？
A.A scientist. B.An educator. C.A TV host. D.An engineer.
22. Which of the following is included in Finders Seekers Boxes?
A.Features of cities. B.Online instructions.
C.Historical mysteries. D.Escape room challenges.
23.If you are interested in handicraft art, which box would you subscribe?
A. Creation Boxes. B.Spangler Boxes.
C.Finders Seekers Boxes. D.Kiwi Doodle Boxes.
