单项选择题Bilingualism could be described as all the following EXCEPT______.
单项选择题The author's purpose of writing this article is ______.
单项选择题Allowing imitation is one of the distinctive characteristics of television. This means ______.
单项选择题The topic of the passage is ______.
单项选择题In the view of the author, the studies of the impact of television violence on children______.