阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Nowadays, we have already reached a period 【小题1】 science and technology are highly developed. In 2016, a new app, Tik Tok, 【小题2】(come) into being, which can help people share interesting things with others. However, more and more teenagers are so crazy about Tik Tok that they are 【小题3】(lose) in it. There is no doubt that Tik Tok has a negative effect on our teenagers.

【小题4】(luck), the Chinese version of Tik Tok is introducing a “teenage mode”, which will limit the amount of time children under 【小题5】 age of 14 spend on the short-form video app 【小题6】 40 minutes a day. It’s suggested that all Douyin users under 14 register for the app by using 【小题7】(they) real names. Besides, Douyin will also be unavailable to those 【小题8】(teenager) between 10 pm and 6 am to protect their physical and mental health.

Actually, 【小题9】(limit) teenagers’ usage of Douyin will also push other Internet platforms with short video contents 【小题10】(take) similar measures.