J: so , how's your course going? Do you like it?
B: i like my professors and the classes, but it's a lot of work.
J: what are you specializing in?
B: right now, I'm doing some research into the languages of different African tribes.
J: that sounds really interesting. Can you speak Swahili?
B: yes, I learned how to speak it when I was little.
J: really? How did you do that?
B: well, I grew up in Africa, so I learned quite a few different languages.
J: that's amazing. Are you doing well in your classes?
B: I don't know because I haven't received my test results yet.
J: when did you take your exams?
B: about two weeks ago.
J: how do you think you did?
B: I left feeling pretty confident about my score, but I heard that my professors are very strict graders, so I'm a bit nervous.
J: I'm sure you'll do well. Did you study hard?
B: You know me; I'm always studying!
J: don't worry. If you don't do well, no one can!
B: Thanks for the vote of confidence, Justin!
specialize:to become an expert in a particular area of work, study or business; to spend more time on one area of work, etc. than on others 专门研究（或从事）;专攻 verb
He specialized in criminal law.
Many students prefer not to specialize too soon.
The shop specializes in hand-made chocolates.
amazing:very surprising, especially in a way that makes you feel pleasure or admiration 令人大为惊奇的；（尤指）令人惊喜（或惊羡、惊叹）的
an amazing achievement/discovery/success/performance
That's amazing, isn't it?
It's amazing how quickly people adapt.