Actually, reporters at CNN don't have any British accent, they still speak in standard American English. I think the reason why students in Taiwan can't realize the CNN news report is perhaps the way of thinking. Even if our students may understand every word the reporters say, they may have difficulties in putting words together, because they still try to translate those sentences into Chinese, while next sentence comes up quickly before our students figure out the meanings of the previous sentences. In other words, it has very little to do with accent, the important issue is to think in English. If you want to say something in English, do not try to think of translating sentences into English then speak out, it will take a lot of time, and you will not be able to response what other people just say quickly.