问题
Mary sits _________ the classroom and I sit _________ her.
A:in the front of, in the front of
B:in front of, in front of
C:in the front of, in front of
D:in front of, in the front of;
B:in front of, in front of
C:in the front of, in front of
D:in front of, in the front of;
正确答案是：
