题目内容：

4 Study and Homework Apps for Android!

Brainly

Price：Free/$15 per 3 months/$24 per year

Brainly is a social network for learners. You sign up, ask questions, and get answers (usually).Additionally, you can browse the site, answer other people's questions, and help them out as well. There They charge on a quarter basis ($15)or a yearly basis($24).

Forest

Price: Free/Up to $1.99

Forest is a different type of app. One of the biggest distractions during study is your smartphone.Forest helps put a stop to that. You open the app and a tree grows, The tree dies if you leave the app.Thus, there is a little motivation to leave the thing alone while you study or do homework.

Google Play Books

Price: Free app, book costs vary

Google Play Books is an excellent source of learning material. Sometimes your textbook just isn't enough and apps like this have plenty of additional resources. Books cost money obviously. However, you only pay for them once. Books are available offline on your smartphone or tablet.

Quizlet

Price: Free/$19.99 per year

Quizlet is one of the most popular flashcard apps for language learning. You can create flashcards play memory games, and even share flashcards with classmates. It also supports 18 languages for about any subject or topic. The free version should work just fine for simple uses, though. The premium version costs $19.99 per year, which isn't expensive for a study aid.

1.What is special about Forest?

A.It helps keep you focused. B.It answers your questions.

C.It provides textbooks for your study. D.It motivates you to plant more trees.

2.Which app can you choose to learn languages?

A.Brainy. B.Forest.

C.Google Play Book. D.Quizlet.

3.What do these apps have in common?

A.They have no advertisements. B.They charge for some services.

C.They have enough learning resources. D.They are designed to do homework quickly.