---Can those at the back of the classroom hear me ?A. seatB. sitC. seatedD. sat

问题补充：

---Can those at the back of the classroom hear me ?

A. seat

B. sit

C. seated

D. sat

答案：

A. seat

B. sit

(答案→)C. seated

D. sat

解析：考查过去分词作定语。be sedted 就坐，seated在句中作定语，修饰those，句意：那些坐在教室后排的学生能听到我说话吗？故选C。