题目内容
Recently,a university in Chongqing has held an activity named “Cell Phone Ninja”(手机忍者).They would like their students not to use cell phones for 21 days.It is really a challenge for most students.
The activity started on April 12th.Each student who took part in this activity got a bracelet(手环).If the student did not use their cell phones,there would be a photo on the screen(屏幕) of the bracelet to show that.If they used their cell phones,a different photo would appear on the screen of the bracelet.After the last class of each day,the students sent the photos to the school's public WeChat to show whether they used the cell phones or not.
More than 800 students wished to take part in this test,and 400 students were chosen.After seven days,only 103 students remained.The test was set for 21 days because some scientists believe that 21 days is long enough to help form a habit.
According to the teachers in the university,the activity was not a competition.It depended on students themselves to make the decision.The teachers hoped their students could form better study habits through activities like this one.
1.When did the activity “Cell Phone Ninja” start?(不超过5个词)
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2.What should the students do every day in this test?(不超过15个词)
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3.Why was the test set for 21 days?(不超过20个词)
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