He is very popular among his students as he always tries to make them ____

in his lectures.

A．interested

B．interesting

C．interest

D．to interest

对于一个经营多年、员工规模上万人的企业，保险公司确定其团体保险的续期保费时，通常会采用（）。

A.混合费率法

B.手册费率法

C.经验费率法

D.随机费率法