第一节 （共15小题，每小题2分，满分30分）

阅读下列短文，从每题所给的四个选项（A,B,C,D）中，选出最佳选项。

　　　　　　　　　　　　　　　　　　　A

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

WhatsApp （US）

Users： more than 300million

Platforms： Android， 10S， Windows Phone， BlackBerry

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

With more than 300million 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 Aug6 it also started push - to - talk service． It's noted for its accessibility， ease of use and the absence of adverts． 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， W．ndo．s 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 texting application that allows users to send and receive messages for tree． With Kakao Talk， users 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 ﹩7 million just from stickers． The popular app also allows friends to battle each other in the LINE Game．

　　21.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