49（） A: Back at Renda, I had walked into my first classes feeling like a celebrity. B: In my students’ minds, I had little to offer them, except perhaps some sample questions for the mid-term exam. C: In others, the TA works as a grader and discussion leader. D: I encountered these in China, and I faced them in the US. E: On the other hand, being taught by a graduate student is not necessarily bad. F: Most were polite, or at least, indifferent.