One of the benefits of the new model is that it is easier ____ t

One of the benefits of the new model is that it is easier ____ than the old one.
A、operating
B、to be operated
C、to operate
D、operated
【正确答案】：C
【题目解析】：在有些be+adj.+不定式的情况下，动词不定式的主动形式表示被动；这些形容词一般为easy，hard，difficult，important，interesting，heavy，pleasant， comfortable，sage等。此时动词不定式中的动词为及物动词。