Nowadays, we have already reached a time     1     social media are increasingly popular. With billions of users every day, Tik Tok     2     (become) the most popular social media for teenagers since 2016, as it makes it easier for them to share daily life with others. While it comes with many     3     (benefit) like self-expression, the development of talents, it also has some problems like trolls, cyberbully and mental health issues. More and more teenagers are addicted     4     it so that parents are concerned about its effects on teens’ safety and health.

    5     (lucky), Douyin, the Chinese version of Tik Tok, is introducing a “teenager mode” to limit the time that children under     6     age of 14 spend online to 40 minutes a day. It’s suggested that all Douyin users under 14 register for the app by using     7     (they) real names. Besides, Douyin will not be     8     (access) to teenagers between 10 p.m. and 6 a.m. to technically prevent them from staying on it for too long.

Actually,     9     (promote) teenagers’ right usage of Douyin will also push other video-sharing apps     10     (take) similar measures.