题目

李明和别人交谈的时候，总喜欢左顾右盼，任意打断别人说话．当妈妈给他指出这个缺点时，他却不以为然：只要我在听就行，其他的不重要．你同意他的观点吗？请说出你的理由。 判断：                       。 理由：                                                                                    。Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months. A. became           B. had become           C. has become       D. becomes