Being requested to complete a survey I've got a message from a person who claims himself to be a student studying applied linguistic in Oxford. He wants to understand the difficulty in English pronunciation for non-native English speakers. What he needs me to do is to complete a 10 minutes survey and then listen to a mp3 file to see how well I can understand the contents. At first I thought this could be a swindle or fraud or something like that. Forgive me for being suspicious, but this world is really not so safe. But then it occurred to me that in abroad it seems very common that people like students or professors conduct surveys to get information. This person also leaves his contact information in the very formally written message. I'm curious. So, I opened the link and completed the survey. I will wait and see what comes next. I am not sure how to confirm this person's identity. Hope what he says is true.