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 emotions 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. Push-to-talk. B. Stickers . C. File sharing. 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

Service Foods makes it easier for cooks to reduce mealtime complaints. Service Foods is so confident that they can reduce complaints, and in fact, that the company is offering a series of mealtime complaint-reduction tips.

According to a representative of Service Foods, complaints can occur when busy cooks serve substandard（不达标的）, low quality meats. As products sit in packaging in the meat case at the store, the meat can age out too much. The natural flavor disappears, and it can be replaced with an undesirable strange flavor. According to Service Foods, complaints from children are common when you serve substandard