单项选择题
A.Positive, because there are abundant resources like videos there.
B.Negative, because social media is harmful to our health.
C.Positive, because there are beneficial videos which one can learn more from online courses.
D.Negative, because there are endless videos which might cause addictive problems among people who use it.
单项选择题 please listen to the video in the website on the issue of social media and then answer the following questions(18-26秒） The old man mentions his position towards social media that（）。
单项选择题 Please listen to the video in the website on the issue of social media and then answer the following questions（0-18秒）According to the kids in the interview, their answers cover the following EXCEPT（）。
判断题 Critical thinking means black & while thinking mode.