【题目】His former teacher’s letter can act as a for him in his application for the degree in physics from Oxford.
A. deadline B. plot
C. reference D. conference
在线课程【答案】C
【解析】考查名词辨析。句意：他以前的老师的来信可以作为他申请牛津物理学学位的参考。deadline最后期限，截止期限；plot情节，密谋；reference参考，参考书，证明人；conference会议，讨论会。故选C。