问题
There is a teacher’s desk _______ the classroom. Mr. Liu is standing _______ it.
A:in front of; in front of
B:in the front of; in the front of
C:in the front of; in front of
D:in front of; in the front of;
B:in the front of; in the front of
C:in the front of; in front of
D:in front of; in the front of;
正确答案是：
