题目内容：

Did you ever bring your phone to school? It doesn't seem bad to take a quick look at a phone message or an email in class. But a new study has found this can make students get lower grades in exams.

In the study, researchers (研究者) studied 118 students. These students took the same couse. They also had the same teacher and used the same textbooks. They couldn't use their digital devices (数码设备)in half of their class. But they could use them in the ọther half. Researchers found that using digital devices made students get lower scores in the final exam. Students díd worse in what they learned on device days. What's more, when some students used digital devices in class, even those not using their phones or computers got worse grades. Researchers say there are maínly two reasons for the resuls.First,students hardly ask questions when they are using their phones or computers. They talk less with their classmates and teachers. Second, even if a student doesn't want to look at the screen, he just can't help it.So remember to turn off your phone in class. This is good not only for you, but also for the whole class.

1.In the study, 118 students took the same course, had the same teacher and used the same textbooks.

2.In the study, students can't use any digital devices in the whole class.

3.Those not using their phones or computers got better grades on device days.

4.When using phones or computers in class, students talk more with their classmates and teachers.

5.The study shows that using digital devices in class can make not only you but also the whole class get worse grades.