题目内容：

Big Messaging Apps Abroad

While WeChat is China's biggest mobile messaging app, there are many similar apps in other countries that offer similar features.

WhatsApp (US)

Users: more than 300 million

Platforms: Android, iOS, Windows Phone, BlackBerry

Features: Text chat, push-to-talk, file sharing, location sharing

With more than 300 million active users, WhatsApp is one of WeChat's biggest competitors.

Developed by two ex-Yahoo employees in 2009, WhatsApp originally focused on text chat, but on Aug. 6 it also started push - to - talk service. It's noted for its accessibility, ease of use and the absence of advertisements. The service is free for the first year, after which $ 0.99 (6. 06 yuan) is charged for a one –year subscription.

Kakao Talk (South Korea)

Users: more than 100 million

Platform: Android, iOS, windows Phone, BlackBerry and Bada (an operate system developed by Samsung)

Features: Text chat, group chat, push–to–talk, group calls, file sharing

With more than 100 million users in more than 230 countries, Kakao Talk is a multi - platform (多平台) texting application that allows users to send and receive messages for tree. With Kakao Talk, users can message each other one-on-one or in group chats with unlimited numbers of friends. You can also choose from more than 250 animated emoticons and share them with friends.

Line (Japan)

Users: more than 200 million

Platforms: Android, iOS, Windows Phone, BlackBerry and PC

Features: Text chat, group chat, push–to–talk, file sharing, location sharing, gaming, stickers

Line tops the list of the most downloaded free apps in 52 countries. Apart from text and voice messaging, Line provides its users with more than 250 original stickers and emoticons to buy from its own shop. In the first quarter of 2013 alone, it made $ 17 million just from stickers. The popular app also allows friends to battle each other in the Line games.

1.The first paragraph of the passage is used to_____________________.

A. introduce the most popular mobile messaging apps in China

B. talk about new features in the latest mobile messaging apps

C. draw readers’ attention to various popular mobile messaging apps

D. explain how mobile messaging apps have become so popular

2.Compared with the other two apps, which of the following features makes Line stand out?

A. Group mobile games.

B. Free stickers and emoticons.

C. Free download of the app.

D. Text and group chat.

3.One of the popular features of WhatsApp is that users_____________________.

A. can send and receive messages for free

B. can enjoy live video chats within groups

C. regularly set free stickers and emoticons

D. don’t need to worry about unwanted ads