Millie prefers to .
A. skating; jogging
B. to skate; jog
C. to skate; jogging
D. skating; jog
网友回答
(答案→)A. skating; jogging
B. to skate; jog
C. to skate; jogging
D. skating; jog
解析：如果是prefer to do的话后面要跟比较结构（如rather than do）,prefer to do 中的to 为动词不定式；perfer doing A to doing B 相比于做B更喜欢做A