选择最恰当的选项填入空格。每空格限填一词，每词只能填一次。

A. courses       B. appeared       C. records       D. caused       E) widely

Wang Yue, a seventh-grader from Jiangsu, opened a study app (应用软件) which can help students work out math problems. However, a series of game advertisements 【小题1】 suddenly which made her feel bad.

In fact, that is just one of several disappointing things about study apps that are 【小题2】 used by students. Study apps aim to help students learn. For example, students can check answers for problems and take online 【小题3】. However, with more study apps coming into the market, serious competition has 【小题4】 some apps to change. How to make good use of them has become an issue.

A. copy            B. polite            C. solve          D. once          E) better

Some study apps have social media features that can disturb students. Li Xieyichang, 14, from Sichuan, has noticed this. “I 【小题5】 joined a chat group to learn from others. However, hundreds of gossipy messages bombarded (轰炸) my phone,” she said. So, she quit (退出) the group chat.

In addition, some students simply 【小题6】 answers from study apps. Zhang Shiyuan, 14, from Shanghai, often sees her classmates do so. But she has a 【小题7】 way to use study apps. “They show many ways to 【小题8】 one problem. I try them one by one and see how they work. Then I use the things I’ve learned to work out the problem again,” she said.