He is very popular among his students as he always tries to make them in his lectures.A. i

问题补充：

He is very popular among his students as he always tries to make them in his lectures.

A. interesting

B. interested

C. interest

D. to interest

答案：

A. interesting

(答案→)B. interested

C. interest

D. to interest

解析：考察形容词用法。本句中的形容词Interested感兴趣的，是过去分词转换的形容词，常常对人的情况进行说明。Interesting令人感兴趣的，通常对事情进行说明；句意：他很受学生的欢迎，因为他总是让他们对他的演讲很感兴趣。故B正确。