问题补充：
The students are expected to pass.
A. were taught by Professor Deacon
B. whom were taught by Professor Deacon
C. when were taught by Professor Deacon
D. Professor Deacon taught
答案：
A. were taught by Professor Deacon
B. whom were taught by Professor Deacon
C. when were taught by Professor Deacon
D. Professor Deacon taught
解析：D
解析Deacon教授的学生，关系代词在从句中作宾语。B选项中关系代词作主语应用who。
