问题描述：
There is teacher's desk ____ our classroom.And three trees ___ our classroom,too.
A.in front of;in front of B.in front of;in the front of
C.in the front of;in front of D.in the front of;in the front of
A.in front of;in front of B.in front of;in the front of
C.in the front of;in front of D.in the front of;in the front of
问题解答：
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