A
Rosetta Stone
The app offers 25 languages to choose from and it listens to your pronunciation to help grasp your skills. It helps you learn language foundations faster. Rosetta Stone starts at $35. 97 for 3 months, but has additional plans of different lengths, including a lifetime membership for $ 199.
Mango
While many of the apps on this list focus on gamifying（游戏化）and making the learning experience addictive, Mango goes in the other direction, paying much attention to detailed instruction. A single language will cost you $7. 99 a month, or $17. 99 for access to all of available languages (that's 70 languages). Mango has longer lessons, which average at about 12 minutes per lesson. These lessons are very detailed, and Mango emphasizes conversation-based methodology to get you toward being fluent.
Mondly
Mondly focuses on gamifying the language-learning experience. You can get started on Mondly for free and upgrade to a subscription service, ranging between $9. 99 and $479. 90. The app is good for those who have no experience in learning a new language.
Duolingo
Duolingo is famous for its owl（猫头鹰） if you don’t keep on track with your lessons. The best part of this app is that it's completely free, although you have the option to upgrade if you'd like to avoid the ads. The upgraded plan is $12. 99 a month, and with 34 languages to learn, it's the easiest app by far to get started with. There're comprehension tests for listening and reading. You'll listen to a story and answer questions to see how much you comprehended from the story.
21. What is special about Mango?
A. It gamifies the language learning.
B. It offers a 12-minute lesson at a time.
C. It is the cheapest app of the four.
D. It focuses on detailed instruction.
22. What is the function of the owl in Duolingo?
A. Training its users' listening.
B. Forcing its users to keep going.
C. Preventing its users from the ads.
D. Helping its users answer questions.
23. Which app is the most suitable for foreign language beginners?
A. Mondly.
B. Mango.
C. Duolingo.
D. Rosetta Stone.
