10 . Because of the COVID-19, many people had to stay at home. Some people made bread, some played computer games and some read. What about 17-year-old Mariella Satow? She not only learned American Sign Language (ASL), but also created an app (应用). Thanks to the app, now deaf Disney fans can enjoy Disney movies fully.

Mariella started learning ASL in 2020. She wanted to use TV shows as learning materials (材料), but she found that few of them offered on-screen sign language. After further research, she discovered that deaf people especially deaf children, were not able to fully enjoy movies. Then she decided to change it. Using the money she made from dog-walking, she worked with ASL experts and a deaf community near her neighborhood to create SignUp.

Users can download (下载) the free app by searching “SignUp” from the online software (软件) store. Since it came out, a great many people have visited the website (网站). Many parents of deaf children have used it and shared their love of the app. Teachers have also used it in their classrooms. It made teaching easier than before.

SignUp is a big deal for kids who can’t read or who have other problems with traditional captions (字幕), or who maybe just prefer signing. It is really a wonderful invention. Thank you, Mariella!

根据阅读短文，回答问题

1. What did Mariella do during the COVID-19?

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2. Why did Mariella decide to create SignUp?

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3. Whom did Mariella work with to create SignUp?

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4. How can the users download the free app?

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5. What do you think of this invention?

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