Mr. Chen is handsome and kind and he is one of in our school.A. a popular teacherB. more

问题补充：

Mr. Chen is handsome and kind and he is one of in our school.

A. a popular teacher

B. more popular teacher

C. most popular teachers

D. the most popular teachers

答案：

A. a popular teacher

B. more popular teacher

C. most popular teachers

(答案→)D. the most popular teachers

解析：句意：陈老师又英俊又和善，他是我们学校最受欢迎的老师之一。one of +形容词的最高级+名词的复数形式，表示“最…之一”，故选D