问题
___ to a lot of new ideaswhen studying in college, Mary always does something that others can’t understand to realize her dream
A:is used tobeing; used to describe
B:used to be;used to describing
C:is used tobe; used to describing
D:used to be;is used to describe
B:used to be;used to describing
C:is used tobe; used to describing
D:used to be;is used to describe
正确答案是：
